The likelihood is that the Bank had a high MINIMUM on the Auction; probably the total amount of the debt.
So it is very likely that no one bid high enough.
The banks do that, so that they can get the property for themselves.
Now, the occupants will be moved, and the house will be listed on the MLS; that will take 4-6 weeks.
You should have your Realtor keep an eye out for the Listing and call you.
Good luck and may God bless