Sucks man. But always remember the moment you mention lawyer the conversation is pretty much over at that point. Just be patient this stuff does happen we are all human. I’m sure there are many times that you have not done something right. They will have to own up to there mistake at the dealer...
As long as you keep records of your service work you are good to go. If anything major happened ford would ask for service receipts. I am a service manager for ford.