Technical Account hacking

[Kipok73]

Someone got access to the account and deleted the characters from Frostmorne and Lorderone after the discovery of a third-party user on the account, measures were taken to change the data and install two-factor authentication, I do not know what to do, so I am writing here, is it possible to somehow restore the characters

[Thorbjorn]

Check here: https://www.warmane.com/account/services and navigate to "Character restoration", see if they show up.
Account security is your responsibility so don't expect help. If you had donated for something, you can open a general ticket here: https://www.warmane.com/account/support?do=new and hope they restore your donated items. Nothing else you can do other than that.