Car repo sold over and over. I thought 7 years was it.

I have a car repo from 2000, the accounts keep getting re- sold again and again, after 7 years I thought it would drop. Will this continue as long as the account keeps being sold? Considering the fact that I did not go into any financial agreement with anyone except the original debtor can I get this removed?
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validate the debt
then complain to your state atorney general