Disastar Dodge Nitro 4.0 L after inspection

Hello municipality brought my 4.0 at the beginning of April for inspection. Car has only 39000 on the clock. It had to be done a very large inspection with TÜV ..should cost around the 1000 Euro. because all oils etc should be exchanged candles etc. I had to be beaten wide. The Tüv allegedly criticized the rear brake discs. I got persuaded to exchange these also, I Dämel. The whole fun afterwards cost me with car rental 1480 Euro. Since then I have been yesterday then the Super Gau. With wife and child made excursion. after 50 km we take a smell was as if someone with the Flex Metal cut through. At the finish I see already, smoke at the back to the right rise. Car raised rim extremely hot wheel could hardly be moved. Workshop called and described the thing. I should not drive any further. The ADAC brought the car today into the workshop. Gerdae calls me the workshop at m for safety reasons left and right. I am almost freaked out on the phone after I was told the costs of course I have to bear, such something can happen and has nothing to do with the exchange of the windows. Repair costs again at least 300 euros. I could just go into the air. On my note that I have hardly moved the car since the inspection, the lappidare answer. I can also pick it up like that costs would definitely not be taken over, the error would not come from the disc change. What am I doing now? I could get angry with the discs at the mileage at all have been changed. Take off, but I am not a mechanic.