How to login using Guest account?

I want to delete my MIR2M : The Grandmaster account.

Account suspended due to refund.

I forgot the ID and password of my Google/Facebook/Apple account.

My account has been banned.

When logging into a Google-linked account, I get a message that says "Google was not able to verify that this account is your account." and can't login.

If I change my device or reinstall the game, can I still use my account?

I logged into my linked account, but I cannot recall the server that I previously played on