I am very unhappy with their service, and won't re...

I am very unhappy with their service, and won't return. They didn't tighten the oil drain plug properly, resulting in poor performance due to oil leakage, thankfully I got it in & fixed before the motor was ruined! They also gouge - I topped up my wiper fluid before going there. The man at the till wouldn't give me my invoice before paying, and when I got it, they charged me for wiper fluid. He refused to refund it.