Addons not working and Character got deleted?

Hello,
I rejoined the game since I wasnt playing quite a while.
After loggin in not a single addon works anymore.
As I did not touch my WoW folder since I made my pause, the Addons should work as intended.
I already deleted Cache, WDB, turned addons off and on, exported my Addon folders to desktop an back to my Wow folder, /reload ingame but nothing helped to solve the problem.

And I also had a Character on which I had spend some money on who isnt in my Characerslist anymore. No refund of the coins on my Account, no message in my E-Mails.

Whats wrong here?
Is there someone who can explain?

Which realm did you play in?

If it was Frostmourne, head over to https://www.warmane.com/account/services and begin transferring your character to Icecrown. Older season characters aren't able to be transferred anymore (you had an year to transfer after the season ended).

Did you have 2FA, or did you ever shared account info?
Did you partake in any giveaway or clicked on links promising points/coins? If you did, your account is severely compromised and change of email, password, and enabling 2FA is strongly recommended.

Did you check trade history? https://www.warmane.com/account/trade (Select sell from Buy/Sell drop box and see previous/ongoing sales.)