There are several ways to turn off the autopay feature on your account:
1) You can visit your profile page here: https://app.bysavi.com/dashboard?panel=my-profile
From there you can toggle off the autopay feature at the bottom of the page:
2) If you are unable to log into your account, you can send an email to cancel@bysavi.zendesk.com and our CS team would be happy to help.