Can the mortgage company come into my home and winterize it and change the locks before the foreclosuer sale

my was to be sold on courthouse step on 2-2-09 but our mortgage co agreed to redo our loa . We were informed of this on 1-23-09 over the phone. They said the foreclosure had been stopped and that we would receive our new loan papers to sign before or by 1-30-09. We had been moving out because we did not think the mortgage co was going to approve refinance and had made up our minds that we were losing the home. We were elated to hear of the approval. Although we do not have anything on paper yet . We began to move our things back today 01-26-09 only to discover that our home had been broken into and winterized and the locks had been changed. I don't understand. The mortgage co told us that they were redoing our loan and even if that is not true the house isn't going up for auction until 2-2. please advise what my next step should be