It is a general assumption that you can’t delete your Apple ID.
Even if you send support or help requests to the Apple Support team, they will say that…
But here is a way out of this goof-up.

First step is to gather all required information to varify your account in one place..
First is Your ‘Username’
Note it down
Second is Your ‘Security Question’s Answer’
Note it down, too…
The third is to be ready to log in with your account
Under the Security tab, you have the ‘Generate Pin’ tab. You will need to click this tab to generate a pin to share with your Apple iTunes Support Team expert, which will help him access your account and confirm your identity.
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