HOW DO I CANCEL APPLE ID AND START OVER WITH MY OLD EMAIL

Please don't type in all capital letters. It makes your post harder to read and is considered shouting on the Internet.

Did you make a new ID and the old email was a separate ID? Or did you do a name change on your existing ID? If the old email is a separate ID, just stop using the new ID. More information would help.

You can deactivate or delete the old one. And you can use What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch https://support.apple.com/en-us/HT201351. After doing so, set your phone up again using your old Apple ID.

As mentioned, You can deactivate or delete an account. Apple recommends doing the first for the obvious difference noted below.

How to deactivate your Apple ID account  https://support.apple.com/en-us/HT208503

If you request account deactivation, you'll receive a unique alphanumeric access code. When you're ready to reactivate your Apple ID, contact Apple Support, provide your access code, and we’ll help you reactivate your account. If you lose this code, we won't be able to help reactivate your account." 

How to Delete your Apple ID Account https://support.apple.com/en-us/HT208504 

“While your request is being processed, you can contact 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.”

You can get additional information on both by signing in here: Data and Privacy https://privacy.apple.com/account