I have the same problem too. I wanted to delete this account, but not long after since I marked it for deletion, I started regretting because my favorite character is on this account and I reactivated it. I have two active accounts now (this and another one), and one of my old accounts is still marked for deletion. I did a mistake as occasionally logging in my account to check out if it's deleted already. It was always active as like I never marked it for deletion. Some people in-game suggested me to not touch the account which I want to delete, because if I do, it will reactivate itself. I think you'll do good if you just leave your account and it will be deleted, soon or late. Yeah, it is a bad thing when you don't know if it is already deleted or not, but I think that's the only way.