Payed in advance for a car as requested. Went to pick up on the arranged date and was told it had an issue so couldn't take it away. This was after a part exchange so I had no car. They spend over a month trying to fix it! I wasn't given a courtesy car and was left to pay for public transport for over a month until the problem was resolved. Since having the car over a 6 month period it's been in the garage getting fixed for 3 months. Mainly due to an ECU fault. Even though I've paid for a 12 month warranty I'm now having to spend over £1000 to get the car fixed as "the warranty doesn't cover it" The diesel particulate filter is blocked due to it not being driven because it's been off the road so often with faults. After being forced to pay £350 to clear it, it has blocked again and I'm now being told be Quest that I need to pay £750 to try something else. I've been to an external garage who have told me there is clearly a deeper rooted problem which is causing it. And should be covered by the warranty! The vehicle is still with Quest Motor Group and I'm being blamed for not driving the car enough to clear the filter. I was offered a part exchange with the vehicle to resolve the issue. They offered me £3000 less than what I payed for it 6 months ago. I will be advising everyone to avoid Quest Motor Group on all social media platforms and all forums. If the matter is not resolved quickly and fairly.