There was something wrong with guilds vaults before the items disappeared.
6 days before the early access a guildie asked me to borrow gold to buy the epic edition with gold. I needed to get the gold out of the gv and it wouldn’t let me get it out. I was making the withdrawal and the gold did not appear in my backpack. Finally I searched these forums, and someone claimed to have managed to extract gold by taking out 200k. I did it in 6 extractions, I put up a ticket and a forum about it.
It was a ticket and this forum in the technical support forums of my Ragnaros US realm.
You can use an online translator.
The guild bank was malfunctioning BEFORE the release of TWW, and they can’t be unaware that they knew it. Unless they accept that they don’t read forums that are not in English.