The bike chain is loose from prolonged usage and comes off when climbing hill at first gear. But this time, when it came off I believe the motor cable got whacked hard. Dont believe it to be the internal motor issue.

I want it to work another 4 months, but the PAS sensor is busted, using throttle and pedalling, tail light is toast, the controller wires inside melted together but I separated them and retaped them. Nobody around here works on Chinese Ebikes. If I get the motor to work smoothly again without the option to replace the whole motor over a wire, I will buy a new one soon. Please help Ebike community!