Vyg I am in a similar situation where my account was stolen. After reading similar things from others I am less optimistic than I was starting out, and I know exactly what you're going through. So far I have just messaged Cyrus, and hilariousandco, and in a weeks time will try messaging Theymos.

This is my stolen account on bitcointalk kworrom: https://bitcointalk.org/index.php?action=profile;u=80785

-----BEGIN BITCOIN SIGNED MESSAGE-----
I can still sign messaged with a bitcoin address (189EGkRQHkzPwqrzvaabgAVj696eL6uQeB) I own and posted on the account, but this didn't seem to get a response or any action taken. I also still own the original kworrom gmail to sign up for the account, and have old notifications from bitcointalk from messages received still. Check out https://snag.gy/Gd7Wu3 and https://snag.gy/OztVaE screencaps. They stole my account to use to spam bounty programs, and then additionally used my identity to create a telegram account and spam youtube. Vyg, have you checked how the person is using your account now? This message was created on August 22nd 2018.
-----BEGIN SIGNATURE-----
189EGkRQHkzPwqrzvaabgAVj696eL6uQeB
G3c8Lqgmvvwz/aLR6ORbuluCGYYwzAHqkTkntEY4IKk0bKueHxzzjowAh4u//jA1aVlVRV8WUUtIQGmDW/cD0TM=
-----END BITCOIN SIGNED MESSAGE-----

I've used the address multiple times: https://bitcointalk.org/index.php?action=profile;u=80785;sa=showPosts;start=920

In the end my best advice is send one signed message with information to Cyrus/hilariousandco/Theymos, and check back every week on the situation for a message from them. If it takes longer than 6 months just move on and consider that they are choosing to ignore your request. This is at least how I am approaching the situation. Hopefully your account is returned to you, or you can find a way to eventually move on to using another account or other forums. At the very least if your account is benefiting from bounty programs like my stolen account is maybe try and contact the bounty providers to get them suspended, or again message hilariousandco to try to ban the account (hilariousandco has not responded to me yet, but said he would look at a message the other day). It is a sad state of affairs, but honestly it's just life... you will take losses and have to move on. This is unfortunately one of those situations it seems.