How to cancel account

Did you signup for the free trial? After the free trial is over they will automatically bill you. If you NEVER signed up for anything dealing with Amazon Prime, contact your credit card bank (or whatever) and report a fraudulent charge.

Fixya has nothing to do with Amazon Prime. Logon to Amazon and go to your account settings and cancel Prime

why do you expect fixya site to have anything to do with amazon prime
it is for you to contact amazon prime direct yourself and do the cancellation
it is for you to contact your bank and to stop direct debit payments to amazon

You can end your Amazon Prime membership, or cancel your free trial to ensure it doesn't convert to a full Amazon Prime membership, in the Settings section of Your Account. To end your Amazon Prime membership or cancel your free trial: Go to Manage Your Prime Membership. Depending on whether you have a paid Amazon Prime membership or are on a free trial, do one of the following:To cancel a paid membership, click End membership, which is the second option on the left-hand side of the page. Note: Paid members who haven't used their Amazon Prime benefits, including One Day Delivery, Prime Video, Prime Music and the Kindle Owners' Lending Library will be eligible for a full refund. Paid members who have used their Amazon Prime benefits may be eligible for a partial refund based on use. To cancel a free trial, click Do not continue, which is the second option on the left-hand side of the page. Note: If you select Do not continue for your free trial, you'll receive benefits until your free trial period ends. Then your membership will cancel, and your card won't be charged. If you decide later in the free trial to continue your membership, you can change this setting back by clickingContinue membership. You can opt out at any time during the free trial period. You can also choose to set a renewal reminder by selecting Remind me Later in "Do not continue", which is accessible in Your Account, under "Manage Prime membership". (This reminder option won't be available if your renewal date is within the next three days.)

You're stuck with Prime, PAY UP!!!

Click here to go to the Manage Prime Membership page.

• If that link doesn't work, go to Amazon. In the Search box, type amazon prime, and then press Enter. On the search results page, clickEnd Your Amazon Prime Membership.
• Sign in to your account. Your username is the email address you used to sign up with Amazon.
• If you're on an Amazon Prime free trial, click Do not continue.
  • At the end of the Amazon Prime trial, your account will be canceled and you won't be billed for it.
  • If you don't cancel your free trial, you will automatically be upgraded to a paid membership, and you will be billed for that.
  • If you're on a paid Amazon Prime membership, click End membership.
    • If you haven't received free shipping through Amazon Prime or used any of the Amazon prime benefits, you are eligible for a full refund. If you cancel within three days of signing up, then you are eligible for a free refund

I have found this on the Amazon.com website.
I have included the link

To end your Amazon Prime membership:

1. Manage Prime Membership .
2. Do one of the following:
   • To cancel a paid Amazon Prime membership, click End membership. Note: Paid members who haven't placed an Amazon Prime eligible order are eligible for a full refund. You can't receive a refund if any of the household members have placed an Amazon Prime eligible order.
     
   • To cancel an Amazon Prime free trial, click Do not continue. Note: If you don't cancel your Amazon Prime free trial, you will be automatically upgraded to a paid membership plan at the end of the trial period. You can find this date listed on the left-hand side of the Manage Your Prime Membership page. You will still have access to your Prime benefits until this date.
     

End Your Amazon Prime Membership

Cancel Your Amazon Prime Membership You can cancel a paid or free Amazon Prime membership in the Settings section ofYour Account.
Manage Your Prime Membership.

Do one of the following:

• To cancel a paid membership, click End membership, which is the second option on the left-hand side of the page. Note: Paid members who haven't used their Amazon Prime benefits, including the Kindle Owners' Lending Library, One Day Delivery and Prime Instant Video, will be eligible for a full refund.
  
• To cancel a free trial, click Do not continue, which is the second option on the left-hand side of the page. Note: If you have a free trial you'll receive benefits until your free trial period ends. Then your membership will cancel, and your card won't be charged. If you decide later in the free trial to continue your membership, you can change this setting back by clicking Continue membership. You can opt out at any time during the free trial period.
  

You can also choose to set a renewal reminder by selecting Remind me Later in "Do not continue", which is accessible in Your Account, under "Manage Prime membership". (This reminder option won't be available if your renewal date is within the next three days.)