Labcorp Paid them off once, then 3 years later they turn my account over to collection agency for the same amount and same services. Nationwide

 In 2012 i received bloodwork that was done by labcorp. I paid them off by late 2013 and then this year they turn me over to a debt collection agency saying i received bloodwork in 2013 for the same thing and same price. But i never had bloodwork done that year or after. When i told the collection agency that they need to contact me directly so i can send them the proof of payment they said labcorp would not be interested in seeing the proof just to send it to the agency. I said no thanks in not supplying them with sensitive financial information.