Car in for new tyre ended up with car unable to start !!!

Took car in to have a new tyre fitted , car was left running for 25 minutes as they wanted to look at exhaust even though that’s not what car was taken in for !! Guy came out your car has overheated we need to cool it down , sat there for another half hour they said they couldn’t cool it down and I would have to leave car there and come back the next day they said the fan for engine was disconnected I have never had a problem with car overheating ever !! Phoned up next day they said car had cooled and was it on test run and I could pick it up later on , arrived there to be told do you want good or bad mews good news it car has cooled bad news it won’t go !! They then said they didn’t know what had happened or what was wrong with it , it may have been when they tried to connect fan or poured water on engine to cool it !! But they couldn’t do anything I left the car there and said I wanted it back in condition I left it is working !!They said they would speak to area manager , next day was told it was starter motor for engine £110 to fix it , I had to pay this as i need car for work and didn’t know what else to do was told if I wanted old pet back it would be another £45 !!! Complained to customer services and got a call today from regional manager very rude man abrupt and basically told not our problem not our responsibility!! So I take my working car in to get a tyre fitted they decide to leave it running for 25 minutes till it overheats I am then left without a car they have no idea what is wrong yet the next day they suddenly know what is wrong ? The attitude of the guy in the garage and the manager was disgraceful I would never ever use this company again !!!