What do I do when I pay a machanic to repair my car and he doesn’t make the repair and he breaks. A part in my car and will not repair that part

I took my car to a machanic this past wensday to replace a water pump and a radiator 30 minutes after the repair was done I drove off starting Coolant looked under the saw. Coolant leaking from the water took car back he was anger then he stared to work on the car again later that night I smelled coolant again looked under the hood the new radiator was leaking on top and down to the bottom of the car took the car back the next morning he was anger aginn put mother radiator in he also broke the covering to my timing belt which is attached to the water pump is Asked to replace the part because water pump is now exposed to the elements so the timing will break and I will be stranded I’m 63 and homeless the car is all I have to keep me safe I’m also disabled and have congested heart failure I have no family that cares about me I’m alone both my feet are numb so I walk with a cane I need help when I realized he had broken the cover to the timing belt I found the part he had laying under