I agreed for new window installation last year in June and paid the deposit of 2000 pounds. For 4 months I heard nothing and then i got told by the company that the price will rise by £3000.I was never told this before I signed the order, otherwise I would never have gone through with it. I cannot afford that and i said i want to cancel the order and get my deposit back. They said that I cannot get it back as the cooling off period is over and in addition they want more money as part of the contract. What can i do?