I had the same problem. I got scammed by a company call DR locksmith limited. They over charged me and cost me £580 to get a new lock change because I locked myself. Do not use this company. I wish I have read these reviews before I call them. They said on the phone £60 and then when he reached my place, he said that my lock need to change n in order to change, I have to drill the lock to get it out, then cost more for a new lock n drilling. Total £580. So I should have declined because it was not what I was told on the phone. Beware of these rip off companies