mazda mx5 bj91 timing belt torn, camshaft bent

hello, have a question about a mazda mx5 bj91, since I am not familiar with mazda a good friend of mine has got a cunning tooth strap, and of course and skilful white during the ride, due to lack of maintenance… a little incomprehensible admitted, but my question is the motor of the mx5 free swinging?????? that would be the last hope for the venture since everything else does not pay off. the car is already in the workshop only to the mechanic I don’t trust so much whole 😛 also he claims that the camshaft is bent, which would interest me how this comes about, the car has only about 150,000 km down what for the mazda actually not the problem should be or????? happy about every helpful answer