Mr Mitchell Calling - Nationwide Cash

I posted a week or two ago about several overpayments on 3 internet payday loans I took out. I discoverd that I over paid all three of them and then sent out c&d emails. One even sent me a refund (signmyloan.net) while another just sort of disappeared (ameriloan.net). The third is giving me grief....

I got a couple of calls today from Mr. Mitchell at Nationwide. I've had two loans with them. The first was a $400 loan which I paid $1440 in total. The second was a loan in the amount of $400, which I've paid $200 on. I told them in my email that I consider myself "paid in full" due to my horrific overpayment on the first loan.

I have googled this and also seen on this forum where this is one of their scare tatics. How do I get him to stop? He said in his message to "stop ignoring him" and "this is not a game".

I'm planning on resending my email to him. Should I also send something via us mail? Will my AG really call this guy? I live in IL.

Any thoughts are appreciated. This guy is giving me the creeps...