That reminds me of possibly the worst service I ever got.
I booked a full service & MOT at my local Kwik-Fit. Three months in advance to coincide with a week off I'd booked to do some life laundry.
At 10am I parked my Fiesta out front and went in to reception to ask for said service & MOT and the chap behind the counter immediately proclaimed that "we don't do servicing here 'cause we don't have a servicing engineer".
OK I thought, that's a bit crap. You took my money and you had plenty of time to warn me. Perhaps they quit recently? I don't know, but I'll still needed an MOT regardless.
"Yeah, the thing is, the MOT tester hasn't turned up yet either. You can leave your car and see if they turn up in a bit. I'll give you a ring if they don't".
Reluctantly I agreed, left my keys and went to hop on a bus. Half an hour later on said bus, they called to tell me the MOT tester had rang in sick, so I should fetch my car.
I got on the next bus back and went back into reception. Chap behind the counter booked another MOT for 10am two days later.
I pulled up two days later and the whole building was still locked up. I approached the car out front and inside were two young lads in kwik-fit shirts smoking a joint and giggling.
"Yeah mate. The fella with the keys hasn't turned up again"
I drove home defeated and rang Kwik-Fit customer services to tell them my whole sorry story. Thing is, they immediately apologised profusely, booked me in for the service and MOT at another Kwik Fit on the other side of the city and gave me a partial refund. The other place did a great job and turned it round in two days (my car failed and needed two new rear suspension springs which they fitted free of charge).
That's when I learned that all Kwik-Fit's are not created equally. Some are good and some are beyond bad.
They don't make my sh*t list created from my own hubris, but they're on a different list of companies that I can't trust.