I received several letters from Trasworld Systems stating I owe XXXX XXXX XXXX XXXX, XXXX XXXX XXXX XXXX XXXX, XXXX, Mo. Phone XXXX. The sum of {$99.00}. I called XXXX XXXX & they told me that my account was paid in full. To ignore the Collection Agency. I do n't want this to affect my credit score & I want Transworld to leave me alone. I called Transworld but could never get through. Please help.