I had a Ford Ka Bj 1998 50 hp when I drove yesterday on the highway about 120 km/h, I had a power loss and suddenly the engine went off. I ran right up and wanted to start the engine again. The starter turned the engine not on. I opened the oil cover and saw at the start that the camshaft turns but without resistance. When the spark plug was removed the electode bent, i.e. the piston bent the spark plug. All the valves (except 1st cylinder) are crooked. What comes from this? My workshop says that I had switched off, but what was not the case, moreover, it would have disassembled the gearbox beforehand or not? Would every helpful answer be grateful, since the car still has a guarantee and I have the feeling that they want to rip me off.