I had a credit card that was supposed to be paid through a debt management company. The company told me that the debt was paid. I was under the impression tha the debt was paid. It never showed on my credit and over that period I have bought 2 houses and gotten other credit cards and loans. Now here we are 10 years later and I get a summons, stating that I still owe the credit card company $3500. What can I do?