How to delete your Apple Account - Apple Support
"What happens if I change my mind after I have requested that my account be deleted?
While your request is being processed, you can contact Apple Support [call them at a telephone number for your country --> Contact Apple Support - Apple Support ] with the unique alphanumeric access code you received, and we’ll help you cancel your request. After your account is deleted, Apple can't cancel the request, reopen your account, or restore your data."
I only see a telephone support option when I work my way down the menus. Since you apparently do have Internet access you can choose some other support option that has nothing to do with the one you actually need and see if you an get chat support, then ask the person there if they can help.