Well I know this post isn't exactly current anymore but here is some advice if your cham is still alive.

Take it to a vet ASAP. When a lizard is as sick as yours it is beyond the point where just fixing the husbandry problems will make it better. Immediate vet care and calcium therapy are in order.

In the future you need both a better source of UV and a better source of calcium and vit D. The gut load is not enough. A higher basking temp would also be good. The bumps and bends you are seeing are the bones softening and breaking because of lack of calcium. The weak grip and falling mean that the lack of calcium has already effected his muscles and nervous system.