Virgin money Mortgage Application ... Surveyor Problem

London12345

We have applied for Virgin buy to Let mortgage . The survey was done 3 weeks before (17 Jul)We were hoping to receive the decision in 1 week time.
But the bank told after 1 week that the surveyor had mistakenly fil the residentiol mortgage report by mistake so they have requested it buy to let report again and after receving the correct report they will make a decision.

Ok 2nd week

Virgin again informed that surveyor have done another mistake by not putting the expected rentel amount so they have asked him to provided this. Again that virgin will make a decision upon receiving this info.

3 week

Today again we call Virgin for an update and they told that surveyor have not yet provided the information and they are chasing him and waiting for the info.

I today then took the contact details of the surveyor company from virgin and called them. I spoke to the manager of the company and he said that he will also chase the surveyor. (Same thing he told Virgin last week)

Please guide me how can I solve this problem as it is taking soo long ...