No, I didn't change it, but someone else must have thought the thread title was misleading.
Did the tire service folk (who are they?) put you in direct contact with Michelin, or are they negotiating the issue with Michelin on your behalf? In my experience, I've never been able to deal directly with Continental, Pirelli, Michelin, but always had to go through a dealership, Discount Tire, etc. Firestone and Goodyear are the only ones that I know of that have brick and mortar stores.
Hoping the tire service can convince Michelin that you have a problem so you can move on. You've got a lot of money riding on this.