Sieged whilst offline

We had a house that was completely covered in t5 and higher on the outside layer and built with iron doors, and even our crest was covered in stone just to be extra sure and somehow when we all came back online this morning everything was gone and we were all dead, so its only possible that either someone sieged us or used some kinda cheat to get in and i was wondering if there was anything that could be done to ban the perpetrator or help us rebuild maybe, cause it does kinda suck as it was 1 and a half days work that we put into that house.

Thanks for reading this at least, Jerry The Scandinavian (Crimson Reaper is my guild btw)

Please get with me in TS when you have a chance.