Auto billing credit card

How do I get rid of avg.  nothing I do will stop them billing my credit card.  was told it would not happen this year, and yet here we go again.

Hello, Yve.
We'd love to look into this. We could not find any recent charges on your AVG account registered with the email address that you used to contact us here. Could it be possible that you have another AVG account registered under a different email address? We've sent an email, please revert it with requested information to assist you further.