My account was hacked recently too. Luckily, since I have been here for years, I have BTC addresses in several threads, some of them locked (so the hacker could never edit them). And I could sign any of them.
I already sent proof to Cyrus a couple of days ago and now im waiting. I have objectively speaking all proof needed to prove the account "manselr" is me, so if the admins are legit (and I don't have a reason to think they aren't) they will recover my account (hopefully it doesn't take ages, because verifying the signed message takes 2 minutes to be honest). I will just wait, but im sure I will get it back.
Good luck to you.
At the current rate it's unlikely to be recovered. If you check the other threads in Meta even accounts with signed messages aren't getting restored or at best they have to wait weeks/months. Accounts could be restored by doing a bit of investigation on IPs etc but it's not foolproof and the forum currently doesn't have the manpower to do even that unfortunately.
On the new forum at least there will be multiple 2FA options to secure your account but I know that doesn't help you right now.
I have enough cryptographic proof for manselr being my account that not restoring it would be like claiming 2+2 isn't 4, so I will just wait. If by november I still don't have my account restored then I will need an explanation for it because that would be nonsense.