you want them to solve issue but you dont let them drive your car? and also left car there?

its your car but you dont wanna let them work on it how to solve issues

some issues happen when car is running, car sit there even they remove the parts put it back the issue sometimes just wont show

go to another SC that is better..ask here or social media or whatever..put car there let them diagnose it

have no choice now, even they drive few km thats just what it is..now you are just donkey-ing around no where..you rant you complain end up you dont let them help you problems cant solve

find another sc put car there, let them diagnose..if cant solve then you complain until they get it right

sorry for being harsh but just trying to give some common sense to you