I very much doubt that your bank will want to take the house at this stage. You need to try and sell it yourself. The banks want to lend you money not sell houses. Repossession is the last stage for lenders to recover any debt owed to them and all lenders will avoid this at all costs. There is a lot of time, effort and money involved on their part.
Have you had an estate agent come round and value the property? You may be able to sell it without losing too much. Speak to them first.