Account Progress LOST in BLIZZARD and ACTIVISION

I used this email account to play COD warzone then I reinstalled the game after one month but the blizzard account name changed and everything was reset from the beginning , all my progress is lost.
Is there a way to bring back our progress then that will be very helpful.
Also my activision account also changed. What Happened is my name LAWLESS is there in blizzard but the digits after “#” got changed so it indicates a fresh account with no friends, same thing happened with in game activision account.
Please resolve this issue soon.

check zone, make sure its europe.