your first mistake was letting these amateurs near your car in the first place. its well known that some of these shops might be ok, there's no way of knowing, and its just too big a risk.
your second mistake was to not pull your car out of there at the first sign of trouble. these places are notorious for messing up things on your car (maybe out of incompetence and not just malice), then asking for more money to fix what they broke.
i recommend you get your vehicle out of there as fast as possible before there is any further destruction takes place.
absolutely do not authorize any more 'work', and refuse to pay if they have gone ahead and done it without your approval.
immediately your vehicle take it to a competent mechanic (maybe through the referral of a friend), and get a full damage report.
that should tell you if there's any option for asking for a refund on any parts or labour.
next time, be smarter and don't even let these yahoos get close to your ride.
good luck - you are going to need it!