Timing Chain off, Told piston valves will be bent. Car will turn over but not start

I have a 2002 Chevy Cavalier and have pretty much spent as much fixing the car as i have paying it off. The car stopped after not even going half a mile down the road. Had someone look at it for me and say the timing chain is off. But since another friend looked at it and turned it over so many times we were told the piston valves would be bent. What should i do? Had it for five years.