This is only a discussion forum where members try to give helpful advice to other members. Nobody here has any power to do anything like deleting someone's account.
If you were not blocked, then editing your profile and removing your email address would delete your account, as Virginia advised.
When you are blocked, the only thing you can do - either to remove the block or to delete your account - is to write to info@wikitree.com, as Susan advised. Please allow them some time to answer - this is a holiday weekend and I'm sure someone will take care of your request soon.