Sorry to hear that mate! I hope they didn't bother or were too stupid (sounds like) to set figure out how to set it on fire.
Back in the mid 90s, my dad's Mazda 323 (1981, I think) was stolen, joyridden and burnt out badly. His brother was a panel beater so they took their time restoring it to better than new condition - not because it would save money (it wouldn't), but because #### them.
When you get yours back, whatever they've done, make it better than before!