If they don't, look for the reviews of Autobody shops in your area on Yelp, and find a shop that will guarantee it, at least for this time. Talk to them up-front about this situation. Those parking garages aren't going anywhere...
I also have to ask, based on your moniker - do you wear shoes when you drive
? A guy I knew at work completely ditched shoes 5 years ago - including when he was driving, walking outside, walking in our building, etc. Eventually he switched to the Vibram 5 fingers. I remember trying to drive from a beach once when I lost my flipflops, and the tactile feel of the accelerator and brake was so weird I might have been at higher risk for scrapes
not that I've avoided them when wearing shoes