My PUBG Mobile Account Hacked via Facebook—Unable to Secure

Someone hacked into my PUBG Mobile account, which I originally created through Facebook. My Facebook account was stolen, but I eventually regained control. However, during the time it was compromised, the hacker linked the account to Play Games and made other changes. I can’t enable two-step verification because it keeps giving me errors, and I’m unable to add my phone number. The hacker even changed my in-game flag and continues to log in from different devices. This is a serious security issue, and I demand an immediate solution from PUBG. I’m experiencing this repeatedly, and it’s unacceptable! PUBG and Facebook need to step up and help secure my account before more damage is done.