Re: buggered engine
Yes, you should of given the stealers a chance to fix it, but i know (more than most) that when they have messed up that badly the people you want touching your car is them. Having said that so long as you have an independant engineers report stating the issue was due to the recon head, then a small claims court IMO would find in your favour.
I would send a strongly worded letter to the stealer with a copy of the engineers report asking for your money back. failing that if you paid on a credit card you can dispute the transaction with them.
Good luck mate!!
Why do people drive anything else?
If you cut me in half an Alfa would roar out and run you over! You've been warned