We had a credit card terminal that was presumed to belong to us. We paid {$100.00} for it back in XX/XX/XXXX. We quit using XXXX XX/XX/XXXX, but they say they never received notification the we ended. In XX/XX/XXXX they contacted us about returning the machine or pay {$450.00} for the machine that I thought we already owned. We said we would return the machine. 
We shipped the machine out and they received the machine on XXXX/XXXX/XXXX. We have been getting call after call from XXXX XXXX of Oxygen Recovery Group about a {$500.00} debt owed to Merchant XXXX. I call XXXX at XXXX XXXX at XXXX and he tells me it has been taken care of. XXXX will not call XXXX to verify, he just keep calling me. I told him and XXXX last time that if I ever heard from them again I would file a complaint and maybe sue them. Well today I get a letter from Oxygen Recovery Group again telling me I still owe and to pay or they will report to the credit bureaus. 
I WANT THIS HARRASSMENT TO STOP IMMEDIATELY. 
XXXX XXXX XXXX XXXX, XXXX.