To delete iTunes account, you have to remove all the credit cards associated with your account by following the steps mentioned below:
- Open the iTunes application on your device.
- Click on “Store” menu on the top of the page.
- Click “View My Account”.
- Now click on “Edit Payment Information”.
- Select “None” and click “Done”.
For more assistance on removing itunes from phone, get in touch with the Apple customer service department.