If you have a paid plan on Guild, you'll need to transfer ownership or close down the plan before you can delete your account.
In either case you'll need to contact support@guild.co (Business and Enterprise clients should speak with their account manager). Please provide us with the name of your account, and the name and email address of the person to whom you'll be transferring ownership, if that's your preference.
Once we have confirmed the changes you can delete your own account from within Guild or we can do this for you.