Nostalrius Begins - Quality wow vanilla realm (1.12)

hello, admin team.
I am currently visiting family and when I came back from buying groceries today I could not log in.
on the website it says "account compromised" but I don't understand because I was able to play the last few days without problems.

what does comprised mean and what can I do?

Thank you

resto

You may not purchase, sell, gift, share or trade any account, or offer to purchase, sell, gift, share or trade any account

Account banned.