I have a sneaking suspicion it is yet another number belonging to Credit Acceptance.  I just got a call also.  This is not verified but the only calls I get from Minnesota belong to this obnoxious company.

This is American Musical Supply. The card I had linked on my payment plan with them was invalid, they were calling to collect payment. Gave them the last 4 of another card I had on file and corrected the issue. Nice people to talk to and great payment plans. :)