Just been through this my friend feel your pain!
That quote is a joke I was quoted £1350 for 15 hours work at £90 an hour, your being quoted nearly £150!!
I have a thread not to old full all info about this probably worth a read if you have not already.
I dealt with a Lucy then a Shayma from VWUK so get through to her she has definitely heard about it for I only got mine back on Sat and spoke to her yesterday to close my case.
All in all I paid £675 which I felt was fair under my circumstances!
Hope you get it fixed with an outcome your happy with, if you need any advice just get in touch. I have a word doc titled AMMO which I let rip on them only an email away!
Jimmy