car ****** from panel shop

My discontinued BMW was ****** from the panel shop on the 31 March 2016. I thought i was taking it to the best, who knew that would end up being the worst choice compared to the small panel shops I've always taken it to before .I don't understand how a place that holds people's valuable assets doesn't have high security. My car had sentimental value and no amount of money can replace it. I am utterly disgusted by this and will make sure I let as many people know how this panel shop can not be trusted with their cars.