My MTA serial was stolen and used by another player

[nocap]

Hello MTA staff,

I’m having a serious issue — my serial was compromised and another person is currently using it to access MTA servers.
I do not use any hacks or cheats, but it seems someone got my serial and is using it on their own client.

I would like to request assistance to recover or secure my serial, and to make sure the unauthorized user can no longer use it.