So to update,
Finally collected my car on Saturday, turned up but the boss wasn't around, no receipts for the work and no reimbursement for costs incurred.
But it does look like the car is sorted, carpets seem dry, electrics all work.
Got the kids 1st birthday out the way at the weekend, and on Monday I wrote a letter, and sent it recorded delivery.
Got a call from the boss on Wednesday, said he felt disappointed how I'd treated him, asking for reimbursement of all costs after he'd just spent £500 sorting my car.
We had a good chat, and to be fair to the bloke, when I've dealt direct with him he has been spot on, its been the hard work f getting to that point.
Long story short, he is sending me a copy of the bills with a cheque for the Volvo dealership costs
I'm pleased its all sorted, and glad to have my car back.