Things keep coming back to me.....
I've just realised that this £1500.00 was added to the intended agreement before we even knew of it's existence. I'll try to explain. When we were with the salesman (pre-signing) he gave us the figures which we ok'd. Now when we then went to the signing stage the very same figures were given and then we went for the extra £1.98 per week, but if we take off the £1.98 for ease of explanation and rounding figures down, we were offered £40.00 per week by the salesman. We were then shown again £40.00 per week by the business manager and agreed the £1.98 for the guarantee. The next day we were given the same figures (£41.98) by the sales manager. So, the figures never changed from first negotiations to final signing. This tells me that they had already added the £1500.00 before we knew of anything about it. Also it would appear that they have lumped all the figures together showing a cash price of £8000.00 with no breakdown of car and guarantee so as far as Barclays are concerned we have purchased a car at a cash price of £8000.00 with no mention of guarantees etc. So we have bought a car for £8500.00 (we gave £500.00 deposit, why??!) plus our scrapheap (which worked) which means we have paid £500.00 plus a scrapheap more that the price was on the forecourt!
I seeth as I write.