took my car for aircon diagnostics and regas to Halfords Slough Farnham Rd, after booking the slot online . after 4 hrs went their to check and a mechanic was sitting on reception and said it would be done shortly because they are busy. I said I will grab the chair and wait , the gent harshly said no wait and fix service today. So stood outside in scorching sun to see if they will start work on my car.I can see my car parked .finally I decided to get my car keys.the Gent on reception brought my key and I told him you guys wasted my 4 hrs after I booked the slot.He told me I booked online and it's not their responsibility. absolutely ridiculous service, that their staff cant even tell a lie properly.Just messing around with people's time without even an apology. after half an hour I got email saying my booking has been cancelled.