The only thing you should be doing is..........Tomorrow morning be on the phone with the dealer who serviced the bike and inform them they need to pick up the mc as it's not safe to operate. Then have it returned to you at the house. There is absolutely nothing you should be doing since (IMO) anything you do could have them say they did the work correctly and the issue is with an unskilled / untrained person working on their mc.
Especially since you've retightened the hardware, they could say you stripped or cross threaded the bolt not them. If that's the issue. You call in the a.m make sure the caliber and or sensor is the way you found it.