I received a letter from Transworld Systems Inc. trying to collect {$56.00} from me from The City of XXXX XXXX Fire Department. I called Transworld and asked what the alleged debt was. The " customer service '' rep was extremely rude and could not even tell me why I owed the amount. I called the City of XXXX XXXX Fire Department and they said they were collecting on an amount that I already paid. No one will correct the situation even though I paid the original amount of {$24.00}. Now they are trying to collect an fabricated number that I do not owe.