Check your purchase document - do you know if the property is freehold or leasehold, do you pay anything to anyone eg ground rent or rentcharge or for maintenance of the estate?
If so then they may be able to help or know who to contact.
If leasehold you should be able to find out who owns the superior title to the land from the Land Registry.
If freehold check the purchase document eg transfer to see who has the benefit of the covenants eg "Vendor" or "Developer" then check the definition eg xxx Ltd, is it them who have gone bust?
If you don't have a copy of it your solicitor lender might or you might be able to get a copy from the Land Registry for about �5.
Hope this helps!