For the sake of others reading, you should have started "proceeding to keep" your home when you started defaulting on your payments. Then, you should have worked with your lender to restructure your mortgage. If that failed, then you should have contacted a real estate agent with experience and or training in short-sales and sold it at a loss.
Your house is no longer considered yours and is a Real-Estate Owned (REO) property. While you can never say never in real estate, the only option that I see is you contacting a lawyer and suing your bank. Odds are, however, that tactic is already been overused and most banks foreclosing now have their "i's" dotted and "t's" crossed--but you never know.
Just something to add for the sake of others, if you go the shortsale route as opposed to the foreclosure route, you might be able to apply for a mortgage again in 2 years, as opposed to 5 years.
new lending rules will require you to wait 3 years. Your best option would be a lease to own program. Check with me off line for details. firstname.lastname@example.org
Linda Greenwell, Realtor, RE/MAX Alliance Lindagreenwell@remax.net or 502-639-3913, call or text 8:30AM until 9PM. I would be happy to help you sort out your unique situation.
If the bank repurchased your home, I assume it went to auction and no acceptable bid was offered. I've not heard of banks offering the home back to the owners who lost it, but I suppose it could happen. What steps did you take to avoid foreclosure? You should probably consult an attorney to see if they see any options you can explore. If I've misunderstood your situation, please explain further.