Think they are taking the piss mate Sounds as if someone has made a fook up and trying to smooth it out.

Collect the car and take to another garage 4 them to look at and then go from there.

Have you seen the car? it has'nt been smashed or stolen?

A mate of mine had a crx took it 4 a mot it came back with a cracked wheel and a bent lwr arm after weeks of hounding the owner of the garage addmited that his son drove the car and offered my mate £2000 4 it this was only after a phone call to the ministry of transport !!!!. he made £600 on top

Good luck