Bank won't issue chq as no HB47, estate in liquidation

Hi, we are having so much trouble getting through the final hurdle. The estate we are buying our house in went into liquidation before our house was signed off by Homebond.

They had originally provided a home bond guarantee but are now providing a 10 year structural guarantee issued by Construction Register Ltd as they can no longer deal with Home Bond due to the liquidation. EBS refuse to issue the chq without the HB47 or a letter from the engineer that signed off on the building originally when it was finished but as far as i can tell that was home bond. Would that be correct?

The builders engineer has written a "Certificate of Compliance with Planning Permission and Building Control Regulations" letter to say the house has been built in compliance with all regulations but he happened to mention in this that he did not supervise the construction at the time of building. So now the bank wont accept this. I have no idea where to go from here? It is only homebond that would have been there to sign off originally or would there also have been another engineer from the builders side? Any help appreciated.