We had a new front door fitted just over a year ago and we've had constant issues with it. It keeps jamming shut and doesn't open. We have called the fitter back a couple of times and he made adjustments, the last time we had a issue ( about 6 weeks ago when it jammed shut again) he contacted the manufacturer who came out and changed the lock and also made adjustments. It's now jammed shut again and I'm at the end of my tether. I go out and worry about being able to get back into my home. What can I do? I'm at the point now of wanting the door replaced. Where do I stand legally with this?