We buys cars bad service

So I had the guys to come and review my vehicle and offered me 43 000 few days later when I got the paperwork in order they decided to drop the price from 43 000 to 25 000 I will never ever use we buy cars again to the the bad serive they over and taking people for a fat ride to give them the best price for the condition the vehicle is in. They truly don't know what they doing please don't use them at all