If a home is wrote off or charge off by the bank can I keep my home?

In 2007 I filed a chapter 13 bankruptcy to keep my home. Mortgage was with a bank that went under, which was takenover by another bank. The first bank wrote the home off or a charge off when I was in bankruptcy. The new bank took the mortgage inturn charged it off also. I still live in the home, and want to keep it! What can I do?