I can’t acces my original game account. The user name has been changed from xProCrafter41 to an other name and all its contents are gone.
Issue appeared after server maintenance. I used the game Launcher that updated itself for the 3rd try.
It may be a temporary issue as it is common when it comes to steam, thats why i never play on steam, standalone ftw. In any case open a support ticket here https://support.gaijin.net/hc/en-us/categories/200005051-Star-Conflict
I messaged support too, Orca and they responded with; Your account has been recovered
“Goes to login”
Spoiler
“We’re sorry, you have a negative galactic standard balance” 
If issue didn’t fixed yet, contact to support please https://support.gaijin.net/hc/en-us/categories/200005051-Star-Conflict