Hello, on Friday myself and my husband part exchanged our ford mondeo for a ford c max grand. We said we wanted a more economical vehicle and we were shown one that was a 2011 reg and was supposedly a 1.6 tdi. We spent hours working out the finance cost, fuel costs based on the economy and tax costs. We agreed to buy and signed on the dotted line. Half an hour after we left the dealer, they called us saying they'd made a mistake and the tax was actually £20 more and could we bring the cash the next day. We thought it strange but agreed. We collected the car the following day on Saturday morning. We got home, looked at the log book and it's actually a 2 litre engine. We called immediately and they admitted mistake and promised to sort it. They've been rubbish calling us back, and offered us an insulting £200 as a 'goodwill' gesture if we'd keep the car to save the hassle. We turned it down as we've signed up for the car for the next five years, the additional tax over this time is £100, additional insurance £10 per month so £600, and extra fuel is £4 per 100 miles, which their breakdown cover allows an annual mileage of 12,000, so even our lower estimate of our annual mileage estimate of 10,000 comes to £400 per year extra. So just our insurance and tax alone comes to £700. We've given them these figures and the maximum they will offer is £500. We've said this is too little. They're arguing the car they've given us is worth £1500 more than the 1.6 (this is a lie, brand new it's only £1000 extra). We asked to swap for another 1.6 they had in stock same spec. They refused saying this car had done less miles so was worth more so we could give our car back and essentially buy that one, at an additional cost of £31 more a month. We could also have our old car back and forget it all, this is also unacceptable to us, if we'd wanted to keep that car we wouldn't have traded it! They've also offered a car that's done 10,000 more miles on the clock, this is doubly unacceptable as they also lied about the mileage of our current car stating it had done 70,000 when in fact it's done 79,000, however, we accept we should have double checked this. Where on earth do we stand? We would never have bought the 2 litre model as the whole point of us changing car was for a more economical one. We've said we know they won't cover all the additional fuel costs, tax and insurance costs for five years (although really they should as we bought in good faith on those figures) but we can't accept less than £1000. I know I'd have a case for trading standards as I have all adverts and paperwork signed by us and them stating we were purchasing a 1.6. I feel they've made a huge mistake and want us to pay for their mess up which is hugely unfair. I've called Evans Halshaw customer care and they've said their complaints procedure is lengthy and I have to give each manager 3 working days to contact me and there are three managers I have to give a chance first. Our temporary insurance expires Friday and we don't want to pay to swap our insurance if we then have to swap it over again and pay for another vehicle. Help please? Is £500 the best offer I can get despite the fact it will cost us so much more than this?