Car shakes at all speed?

Q: Changed the tyres first then got alighment and balance done. Car was smooth like silk. Right after that the mechanic changed 4 rotors and pads (after market). Car started shaking, wheels got heated, rotor burnt. Replaced the same make rotor again. Rotor still gets hot and skaking persists. Replaced with 4 Nissan original Rotors, still shaking and heating persist. sTook it to nissan, they found incorrect break pads installed. They replaced break pads, machined the rotors, did balancing and alignment. Still the shaking is there. Nisaan technician said, the wheels could be a little bent and suggested me to change all 4 rims. I was not happy with it, b/c, the car was not shaking 3 weeks back before replacing the rotors first time. I am not in a position to spent any money on this car just for guesses. A correct sequence of steps to investigate the problem will be a great help for me. Please help. It can be mentioned that the first mechanic used hammar to open the caliper in the left back.

A: If the wheels were bent, when you had the tires changed and balance, you would have been told. I would take it back to you place the did the rotor replacement because they have some explaining to do. You can also take to midas or a brake shop and let them do a break inspection. Its usually free.

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