Will a car start with bent valyes and pistons

What is your question?

I was driving slow to make a turn. My car suddenly quit. Had to have it towed to a repair shop. I was told the timing belt broke.Didn't hear any noise, it just quit. Repair cost $649.37 for replacing the timing belt & waterpump. The technician started the car & it ran a few minutes and quit. Now they say the valves and piston are bent & the engine has to be replaced. I believe the tech Didn't have the belt on correctly or the timing set right & didn't check the pressure on the valves before starting the car with the ignition switch, causing damage to the valves and piston. What is your opinion?

What makes this problem better or worse?

Unknown

How long has your 2007 Suzuki Forenza had this problem?

Suddenly, no prior problems