Claiming a refund for faulty double glazing back door

wazzaperson

We purchased brand new windows and doors for our whole house in September 2023.  We had a number of problems with the company, which were eventually rectified by December.  Or so we thought.  The door they originally tried to fit was the wrong size so they took it away and fixed it in their workshop, however they obviously did a poor job because the sash holding the glass panels fell out of the frame one day in September 2024.   The manufacturer told us that what they should have done was order a whole new door and frame.  When the door failed I wrote to them (email and recorded delivery) explaining the problem and that what I now wanted was a replacement door and frame as I had originally ordered.  They insisted that I did not need this and refused to order a new door, they only ordered the replacement sash.  When they came on site in November 2024 the sash that they ordered did not fit the frame. They had to apply a temporary fix to the broken frame and put the old sash back in.   I wrote to them again now saying that I would only accept a refund for the faulty door as originally ordered as I had given them 2 attempts to fix the broken door and I was not required to do so any more.  I now appear to be stuck in a loop with their managing director where he is refusing to offer me a refund or even a completely new door and frame unless "he comes to talk to me about it first", I can only assume that he wants to come to the house to inspect the door and to then try and tell me that the fix is adequate or that if it breaks again he will repair it.  I'm interested to know what people think my rights are here.  I believe that I have done everything I am obliged to do (and more) under the Consumer Rights Act and that the best course of action is now to make a financial claim against them.  Any thoughts?  Any tips?  Thanks