I have a Jeep Grand Cherokee that I purchased from a dealer and after seven days it overheated, causing damage to the engine. He's refusing to do anything under the warranty he provided with the car or my rights under the 2015 Consumer Act. He s states that the car was checked before I had it therefore it's my problem and must be my fault it has gone wrong. The advice from the consumer helpline is that I should now take him to court to get my money back from him, something that I'm worried about whether I can afford.