Have you lost all of your items? If so then contact steam support and fill out/explaining what happened. It will take them about a week to reply and as a one time thing they will give all items back. After that you are on your own.
This comes from my own experience as I have had all of my items stolen.
So my office chair exploded (the hydraulics went and I dropped a foot) therefore, I need a new chair that I can sit in for long amounts of time coding and gaming. Something around the $250 CAD mark.
Any advice would be great.