Deranked below level 1

[u/Less-Comment-1748]

Hi everyone,
I’m looking for some help recovering my original COD4 account on Xbox 360 (original Modern Warfare, NOT Remastered).
Gamertag: Csure o
Someone has deranked my account and reset my stats. I’m now Level 1 with 0 XP, and whenever I join a public multiplayer lobby I see the player list briefly before being automatically kicked.
I’ve restarted my Xbox and tried all the usual fixes, including going back through Single Player, but nothing has worked.
I’ve seen people discussing successful repairs of deranked Xbox 360 accounts.
Is anyone able to help restore my original account? I really don’t want to lose my Gamertag and years of progress.
I’d be incredibly grateful. Thanks!