I agree with the previous thread that if you go in person, things seem to get done.
I was there last weekend for the now famous community meeting (time well spent!) and I went to their aftersales office because we still have an issue with a small amount of damp.
When I mentioned that it would be best if my solicitor spoke to them because of communication issues (the girl's english and my spanish wouldn't meet in the middle), they said they would come and do it on Monday. I understand from my keyholder that this has happened.
Cheers