Account was banned for no reason

I haven’t logged in to play for a while but yet I receive several emails telling me that my password was changed even though I didn’t request for a password changed, fearing my account security was breached I changed my password and the next thing I knew I received another email telling me that my account has been disabled… in addition to that I’ve been receiving emails telling me someone else has been purchasing copies of the game from Hong Kong when I’m based in Singapore… I’ve lodged a case with the team for this but they’re taking too long to even respond, the reason the hacker used written in Chinese loosely translated is that he/she has trouble reproducing 🙄 what kind of basis is that for disabling my account to begin with…