Complaint Review: youfit health club

Youfit continued billing me after I canceled my membership and paid $25 cancelation fee. 9 months later I get a letter from collection agency for unpaid balance. I sent proof of cancelation (from 9 months ago) and they advised it was a different account number and will now report to my credit bureau for non payment. I only had one account with youfit and haven't been back since canceling. It seems like this happens often based on other feedback I have read.