how to trade my roblox gmail account

Previously, I changed the email for this account to receive emails to my email inc. But now I quit my job and that company email also ended. Now I want to change my email, I have to enter the 2-step verification code that was provided for my Gmail job account. But I can't reach it anymore. Then i go on Roblox Support website but i can't sumbit the button send even fill in all required information. What should i do? I really need help

:)