Well, you can document your attempts to close the account and report it to the police. It's just a lot of work and you will only gain a document you can use to press your credit card issuer into rejecting the payments.

Also, if they do send your debit to collectors, you can go to a court and ask for the debit to be dropped and for them to pay damages. That is a lot more work, but if they are clearly on the wrong will get you something.