Do Not use them!

I have used Anglian windows twice before, the first time I couldn't fault it, the second we had to get the builder to rebuild the brick work as it was a complete mess, however he did the work, I then ordered a porch on the 6th of March that was due to be fitted on the 7th of June, it was then delayed to the 11th of June, 14th of June, 28th of June, 6th of September, by this point it was very clear that the person I dealt with  had lost all interest in any customer service as I was continuously hearing the repeated lines "All dates are provisional, and the builder is held up, I cannot give any other information" Then we had the date of the 3rd of November, which of course became the 5th of November and now after calling and speaking to five other people who have all been helpful and supportive but cannot actually help other than to record your concerns and pass them on. I have had a call from the original person again who has stated 13th of January, I questioned how a builder could be delayed for 6 months or if my job is just being pushed back, she informed me they have taken on a lot of work and the builder builds conservatories not Porches!!!!! When I asked the question then why take a £5000 deposit from me for a porch (which they advertise as doing) I received the repeated line "all our dates are provisional"!!! then she said, "Thank you, Goodbye" AND HUNG UP!!!! I am starting to believe they are never going to build my porch and I have lost £5000 the stress and anxiety they are causing me is too much, I have asked to speak to the Manager, I wait to receive his call!! I have called again and spoken to a very helpful man who has updated my concerns and put through a message that I would like contact from the manager, I only hope I get some confirmation on my porch soon.