Hi Red X,
Thank you for making this report.
I will be denying this as I don't see Jack doing anything malicious or otherwise abusive. Jack and co. were obviously basing in elevator and the main door owner, for whatever reason, disconnected which caused the main doors to be sold despite co-owners being listed on them and the base being in active use.
This whole event was caused by a technical limitation on the server and could have easily been sorted out in-game by opening a civil dialogue to work out exactly what happened; I don't think you personally handled this well considering you returned to the district, with active NLR, and kicked off in OOC.
In future, I would suggest making an F1 or politely asking to speak to staff to resolve this kind of situation at the time as, if Jack and co. weren't basing, they more than likely have handed over the base with no trouble at all.