We’re 1m away from starting renovation on the house so don’t rly care just don’t want any noise and ideally avoid the hassle of trying to find a spark!
Then i'd take the switch off (turn the circuit off first at CU) then unwire the line from the switch that feeds the fan - there may be a permanent line and a switching line plus a neutral you'll need to disconnect.
You could then get it sorted as part of the renovations i guess?
Probably - do you care to keep the fan going or happy to have it off permanently?