I had a medical collection of $50 from NPAS show up 4/15/2013. I received a bill for $279 and paid it. Of course I thought that was all I owed. I called NPAS they had my address but no apartment number, manager said they did not call me because amount was so small. They let it sit at their office 90 days with no attempt to collect and then reported. NPAS refuses to delete even though they made an error in billing. I paid Methodist Hospital the $50 but did not ask them to retract account from collections. Apparently the first bill was for the doctor only not hospital. I never knew that I owed any one $50. This is only on my experian report and is my only collection and dropped my score 60 points. What can I do?