Phone? what is a phone number for norton internet security?

contact symantec to get it sorted out
https://support.norton.com/sp/en/aa/norton-billing/current/contact?entsrc=redirect_pubweb or

Turn off Norton Automatic Renewal service This document provides you the steps to turn off or cancel the Norton Automatic Renewal service for your product to prevent future automatic billing and renewal. You may need to follow these steps if you have got a new Norton product and need to cancel the service on a previous product which you no longer use.
If you cancel the Automatic Renewal service on your current product, you must manually renew your subscription before it expires or risk losing your Norton Protection. If you have already been charged and want a refund, read Requesting a Norton Automatic Renewal refund.
Turn off Norton Automatic Renewal service

1. Go to Norton Management to cancel the Norton Automatic Renewal service.
2. Click Sign In.
3. Sign in to Norton with your email address and password.
4. Under Automatic Renewal, next to the Norton product for which you want to cancel Automatic Renewal, click Off.

https://support.norton.com/sp/en/aa/norton-billing/current/solutions/kb20090818144126EN_EndUserProfile_en_us?entsrc=redirect_pubweb

contact symantec
https://support.norton.com/sp/en/aa/norton-billing/current/contact?entsrc=redirect_pubweb

The Norton 360 have different versions Norton 360 premier, Standard, Net book Edition

Norton 360 premier Edition installation file download link: www.norton.com/n360p_5

Norton 360 Standard Edition installation file download link : www.norton.com/n360s_5

Norton 360 net book edition installation file download link : www.norton.com/n360sne_5

download the installation file run that then it will remove old version if it's installed

after installation you can activate that using the key.

if you have any issues you can contact in email address [email protected]