Prime is a one time membership fee. That charge was for a purchase as the price is also wrong?
At the end of the Amazon Prime free trial or your chosen membership period, your card will be charged automatically for the next membership period. If you choose to be charged on a monthly basis, your membership charge will be $10.99. If you choose to be charged on an annual basis, you will be charged $99. Prime Video membership is $8.99 a month.
If you didn't intend to continue your membership from a free trial to a paid membership, you can cancel your Amazon Prime membership on the Manage Prime Membership
page. If you haven't used your Prime benefits, you are eligible for a full refund.
If your Prime membership is associated with a service you receive through another company (such as Sprint), please reach out to that company for details about your membership rate and to manage your membership.
About the Amazon Prime Membership Charge