Fix bathroom extractor fan

Hello! I had another Airtasker install a new bathroom extractor fan. However after two weeks it started sparking and tripped the system. My tenant has now isolated the fan and it is off. It looks like some wires are too close to the blade to be able to adjust the timer. Airtasker in question claimed it must be a fault with my electrics, which seems far fetched to happen just two weeks after the installation. Airtasker did pop back but annoyingly my tenant didn’t hear the bell. Looking for someone to go and check the wiring situation and repair what’s needed. It’s a brand new extractor fan. Thanks!