No one here can do that for you.
I recognized you from the Prodigy wiki after you impersonated Glaciersong. Honestly, just change your username and I think we'll be fine with unblocking you.
I want to delete my account, I knew that was wrong, I tried but I cannot, I want to do so.
Accounts cannot be deleted once created. You can disable your account via Special:CloseMyAccount.
If you are an EU resident, you can exercise the "Right to be Forgotten". See Please forget my Fandom account for more info.