It is so strange and incredible reading americans having issues with auto payments. But I presume you do not have anything like Direct Debit, and the protections that some with that, like having to notify you well in advance of payment changes, or if the wrong amount is taken you get it back.

https://www.directdebit.co.uk/direct-debit-guarantee/

You can also cancel it directly from your bank app as well, no messing around, its a simple 2 click process.