It seems to me that you're heading to the right direction taking in consideration the amount of steps you already took regarding trying to recover your account. I'm sure that whenever the team that leads with these issues reaches your "ticket" it will be solved rather quickly.
On a second note do think how did the hacker managed to grab your password - Did you installed something "shady" recently? Did you clicked in any suspicious link that sent you to a "Look alike" of this forum? Bear in mind that if you use this password in other accounts/websites you should consider changing it immediately... No one knows what kind of information did the hacker obtained and thus all defenses should be up. I also highly advise you to run a full AV scan or a Malwarebytes scan prior to changing passwords in other websites you may use so that you may be certain that you're safe (or at least erase that possibility out of your list).