I really want to delete my account because i have no use for it, and i don´t even know why i made a account ^^
You will need to contact the Account Support. There should be a contact link on your current account page at UnrealEngine.com, or https://www.unrealengine.com/contact
via https://answers.unrealengine.com/questions/91317/how-do-i-delete-my-account.html