Horrible experience buying on the Help to Buy Sche...

Horrible experience buying on the Help to Buy Scheme with this Developer. I was supposed to complete 5 weeks ago at the BRX development in Stockwell and they are holding up the whole transaction because they are not bothering with contacting HTB for an extension on my loan. No one returns my emails I have email Angela Barry who is a sales manager a week ago and she still hasn't replied. The developer's solicitor gave me 10 days to complete only to now be a month over due to their lack of effort to get the HTB loan extended. This has left me with out a proper home I am living on my landlords couch with an additional person and no one at the company cares. Both solicitors on either side can't even get them to do any.