Franklin Park Lincoln Mercury

I just received the worst customer service from Franklin Park Lincoln Mercury. In November when I had the accident they charged almost 4000.00 to repair my car. On Sunday it started to lerch the way it did right after the accident. I didn't want to pay for a second time only to be told it was something they had just replaced. I called Franklin Park and spoke to someone in the body shop and they told me to bring the car in and they would make sure it wasn't something they had just replaced. They mentioned nothing about a 96.00 fee to have it looked at. Today when he told me it was $400.00 to replace a sensor and part of that was to look it over. I questioned that and Dave in service became very rude. He told me my daughter signed for the 96.00 and that I was responsible. I said she's 17 and nobody not even her told me she signed for a thing. "well next time", he said "don't send a child to do your work". Then they told me it was all my daughter's fault because she brought it to the wrong department.  What was the point of me even calling to make sure this is something I could have done?  I asked to speak to the manager and was told that the owner was in Florida. I immediately called back and the gal at the phones told me the owner was not in Florida but he was out of the office. When I told her what was going on suddenly the owner Bob appeared on the line. He clearly had been filled in by Dave the service department and told me my daughter took it to the wrong area, also very condescending. I hated having to use them in November but Nationwide made me use them, I thought there prices were huge then, (if you could have seen how little damage there was to my car) and they took 10 days to fix it. Now I am stuck either giving them 400.00 or 96.00....which to do? I was treated like crap from the service department, told to bring the car in at no cost from the body shop and the owner. Bpb Fletcher, doesn't care because he needs another trip to Florida.