Poor Service and arrogant staff

Insurance claim on a geyser , while removing the old geyser the plumber broke a geyserwise control unit cable. Gave me a second hand one as a replacement , did not reconnect so unit is STILL not working. Close to a month later no joy. Say i must get an electrician to fix it. Very dissatisfied and vey arrogant staff. DONT USE THESE PLUMBERS!!!!!