I had a house fire and want to know if the smell will leave?

I somewhat revise this question about my house fire becasue of some of the answers that were given and thought to elaberate. All the floors, carpet and drywall was replaced throughout the house. Only one room they did not take out the drywall, but everything else was replaced. I still smell smoke in that one room and i think it is coming from the drywall that was not replaced. I have already started moving back in want to know if the smell will ever go away or what should the contractor be doing since all the attemps have failed. They used kill x, but I dont think it was used on the wall. They also used an ozone thing that is designed to kill the smell. I now have new carpet and furniture in that roome and still smell a little bit of smoke. What can I do now dealing with the smell and to sugest to the contractor?