Appliance Repairs Job - Plumstead, WC, 7800

My fridge is not running at all, at first it was running on and off for about 1 week. I asked a guy to come and fix it he said it was a starter problem. He changed it but the following day it switched on and off again. He came back and said it could be a timer problem or something. But I can’t trust him now. And he’s not reliable.