To get your old account back on Roblox without an email or phone number, follow these steps. First, create a new Roblox account. Next, scroll down to the bottom of the new account page and click on “Help.” Then, select “I forgot my password or username” and follow the prompts.
If you still can’t recover your account, click on “Contact Support” and fill out the support form. Make sure to enter your real name (optional but recommended), the username of the account you want to recover, and an email address for Roblox to send the response.
Submit the form and wait for Roblox’s response, which usually takes about 24 hours. Providing proof of purchase for any in-game items can also help speed up the recovery process.