Battery Cable problems of the 2013 Chrysler 300C

My car caught on fire while driving home. Prior to this incident, three days before fire happened my car kept overheating, but if I was on the freeway car wouldn't overheat. Got home and car would not shut off. My son ran over to the car and told me to disconnect battery cables cuz car was on fire and wouldn't shut off. Son opened the hood and saw the fire. He couldn't put it out. Then it just went out by itself. After examining the engine compartment found that the tipm was on fire. Opened tipm fuse box and several relays were melted. Called dealership and they advised calling corporate. I called corporate and it took over a month for them to respond. First they said they were sending out an investigator that never showed up. After 4 phone calls they called me back and stated they wouldn't fix my car. It would cost me to repair the car. My car was on fire while I was driving it. Chrysler says they take any car fires very seriously but I guess mine wasn't serious enough for them. I have been walking for months. My next step will have to be suing Chrysler corporation.