Transworld Systems Inc. Debt Collection Complaint

Transworld Systems Inc. Debt collection department,

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

I continue to receive threatening letters from Transworld Systems in spite of the facts that:1. The debt was paid by check which was cashed on - -, 2015 ; 2. I telephoned Transworld Systems on - -, 2015 at - PST and informed - - that the debt had been paid. She assured me the threatening letters would stop but I received yet another on - -, 2015.