Branch manager ROB made everything "BAD" I phoned ROB regarding oil, oil filter and air filter replacement query "labour only" for £40. I supplied my parts and arrived to Hemel Hempstead branch on the 03/07/2019 at 15.00 with my friend. Air filter did not fit what I bought and Rob told me to supply the correct part and come back again. I said "ok, I ll come back ASAP" and paid £40 cash, got my receipt then we left. I just visited Hemel branch today after I ordered and received correct air filter part. Air filter replaced apprx. in 10 mins as a part of our deal but ROB requested me to pay additional £10 for this and I said I did not get the money with me as it was a part of our deal. He did not allow me to finish my sentences he started being rude with very unprofessional manner,shouting tone and said "Take your car keys and don't come here again" I tried to explain again and said "please check your notebook and you will see what you wrote there". He still did not listen and interrupted me and repeated that "don't come here again". This person makes Mr Clutch brand quality lowered. He does not know how to speak and deal with a customer. He must replaced with a new manager ASAP. Totally disaster and loser! I strongly NOT RECOMMENDED to visiting HEMEL HEMPSTEAD branch if ROB works there.