Steve,
Sorry for the delay in responding. Work had me out of town. I definitely know what your going through and the frustration. I ended up calling Don 6 times a day. 3 voicemail's at the house and 3 more at the shop number. I think I just got a break on the 4th day when leaving a really heart felt message at the shop # ( it probably sounded like I was crying
) that Don picked up the phone and said he was just going through my paperwork. I think Don really wants to do right by everybody he can.
That being said...
As others have said, I think I would start out with a registered letter. At least you will get verification it got delivered. After that... Well. I was prepared to take a road trip to MN
Ed