ULPT Request: Gym owner makes it impossible to cancel

So I was a member of a gym for a while and it’s a chain, but each individual gym is independently owned and operated.

This guy has a history of making it impossible to cancel and his google reviews show how many people have had the same issue.

Anyways I’ve been trying to cancel for a few months after I moved away, but the charges still keep coming every month.

Any suggestions for how to get some payback other than leaving another scathing google review?