Engine problem.

Hi to all? Am having problem with my Renault ménage 1.5dci 2005 Reg. I recently changed the timing belt, water pump and alternator belt and was running fine.I drove to derby and on my way back, I discovered that there was noise coming from the engine so I pull on the hard shoulder and found that the alternator belt has snapped.

The next day, I replaced a new belt and start the car but to heard a crank noise from the engine and all of a sodding the fuse from the positive battery blow off ,any time I put the fuse, the engine will like about to start and the fuse cut off. Please I need help to fix the car ASAP.