Very expensive wouldn't use again

Found the collection and delivery of the car really helpful but that's about it. The garage itself weren't great and when I recieved the paperwork back it didn't have any of the additional things on it that I had had to pay for to keep my car under warranty, so therfore I had no proof it'd been done. It did cost quite a lot more than expected and the original quote was ridiculous! After refusing to pay that much, service stop said they would speak to the garage and when they called back the quote was over £100 cheaper! This makes me wonder what the extra cost was in the first place and where that money woukd have gone had I agreed to the first quote?!? (which some people would have done). Had problems with the payment system and had to ring up because I had no confirmation of payment email and they took £25 off me for my next service even though I didn't tick the box! I asked for refund, which they said they'd give me, but I still have never received one. I wouldn't use them again.