NCO Financial Services NCO Portfolio Management, ripoff, Says I own them $9,000 on MBNA account that was paid Baltimore Maryland

I paid off a dept from an MBNA credit card in 2003. Since then my CREDIT REPORT has shown it has been paid as well. Recently I was able to get a low interest credit card, on my road back to good credit.(card still in good standing) IMAGINE MY SURPRISE WHEN NCO CONTACTED ME TO SAY I OWN THEM $9,000. Principle, they say was $4,985.48 (where did they get THAT number?) and their interest is 19%. I guess because I so readily paid off my collectors in the past, when I actually did own them, that NCO thought they could get more money from me. It doesn't phase them that MBNA and the original collector listed the dept as PAID, ON MY CREDIT REPORT. After reading other submissions, I fear that may have changed since the last time I checked.(about 2 months ago) I AM LOOKING FOR HELP IN PROTECTING MYSELF FROM THIS PREDITOR.

Aaron
Orlando, Florida
U.S.A.