How do I deal with payday lenders that are not licensed in my state?

Question Details: I have a number of internet payday loans that I recently found out are illegal here because they are not licensed. I contacted the my state's Department of Commerce just to verify this infromation. They told me that they are all illegal except the ones that are Tribal entities. I have paid these lenders a ton in interest and still have not paid off any of the principle. I have been told that I am only responsible for paying the principle balance minus any interest I have paid on these loans because they are illegal. How do I go about getting the payday lenders to agree that I have paid them what I owe?

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