Transworld Systems Inc. Debt Collection Complaint

Transworld Systems Inc. Debt collection department,

Medical Cont'd attempts collect debt not owed Debt was paid Illinois

Transworld Systems , Inc. - - -, -, PA - has - mailed me collection notices for a bill I paid directly to - - -. I paid $610.00 on -/-/-/2013/15 check # -. It cleared my bank. I have copy of cleared check. I responded to the first notice with a written note back stating that the debt was paid to - - -. I enclosed front and back copy from my bank of cancelled check. The - notice was received yesterday in my mailbox -/-/15. Today I mailed back another response and same photocopy of cancelled check. This is harassment. They could / should have contacted the original debtor.