Any hotline to call? Some games do offer assistance over a toll-free hotline, even if their call centre is in the US.
And u prob need to find Apple Singapore (if it exists) and call them to release the auto-cooldown. Coz the hacker can do some damage to your account.
No hotline, I indeed called Apple in the morning about it and the guy also said to enable 2FA but I told him about the auto cool down but I think he said to wait for it...

