If Administrators have been appointed they should contact you to confirm your interest with the Auction House. Can't recall the exact name of the paperwork, but you will need to complete forms and send back proof of your interest (ie receipt of your property the Auction House gave you). It can take b/w 1-2 years before you will know if you will even get anything back. The banks always get their money back first, then the solicitors fees. If there is anything left over it is split up amongst the Creditors. I used to work in a Solicitors office as a Bookkeeper & Law Clerk and did the financials for solvency files, very interest work - you get to see what really happened to all the money.
I know the police wont help they are completly useless & will tell me its a "civil issue" even though to me he was scamming people right out of their money in the end knowingly & willingly.