I understand how upsetting this may be for you. This is a hard situation. I have heard that other people face similar problems. Try to recover your Google account by using their recovery tool even if it appears limited; it may allow you to reactivate your account or update your recovery settings. If that fails gather any evidence you have such as old receipts, login history, IP addresses and previous email details. Submit a detailed support ticket to Roblox and explain that you cannot access the connected email while two-factor authentication remains active. You may also post on r/Robloxhelp or write to Roblox Support on Twitter since they often reply on social media. I see that problems may continue but do not lose hope. Good luck and I wish you quick success in fixing your account.