Does not receive follow-up activation email to set up password for Sandbox

I am registering to sandbox with this link, after receive verification email, i entered Fireblocks Developer Sandbox Agreement, accept terms and press submit but does not receive any follow-up emails. Tried several times but always stuck at that point. One point is that I used to sign up successfully with a colleague email (with the same domain).

My mail is phudoanvuquang@agribank.com.vn