Delete Enterprise Trial Adobe Sign Account

Hello! I've created an Adobe Sign account a couple of days ago and did not use my Adobe ID email address while signing up so, it's totally separate. I accidentally chose the Enterprise  Trial plan and now, I want to permanently delete my Adobe Sign account. However, I couldn't find a way to do it myself, and the support team couldn't help from chat due I created the account as Enterprise Trial. Please delete my account. What should I do?