sold as seen or warenteed?
All Traders Must offer a Warentee, if they are a Trader self employed or ltd.
What the warentee is worth is another question, as there as much use as the paper its written on.
Take Pictures, receipts names log everything.
If there was an ad get a copy of it.
And show them. Trading standards is not going to act quickly.
Or you could try the small claims court.
Dealers (not all) are hit hard with the recession.
There going to try and get rid of anything with what they can.
Personally i would park right across there gates.
And warn people as they enter about the level of service.