Creditor called at XXXX from XXXX claiming to be with " National Fitness '', only revealing they were with a collection agency 5 minutes into the phone call. I explained to them I canceled the gym membership and did not owe anything. They then asked me did I get this cancellation in writing, I said no, I spoke with the gym employee at the front desk and they said they would take care of the cancellation. Apparently, the gym employee never did this. I told the agent it was therefore illegal for them to to still be charging me. The collection agent then got belligerent, so I told them not to call my phone anymore and hung up. The same agent then called again at XXXX from XXXX, again stating they were with " National Fitness '', and began reading my credit card number aloud, at which point I hung up the phone.