Step 1:
Go to https://my.norton.com/extspa/account/subscriptions
Log in with your Norton account credentials.
Disable the Automatic renewal by setting it to OFF.
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Step 2:
Choose a reason why you want to disable the automatic renewal and then click the button Continue.
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Step 3:
Confirm again that you wish to disable the automatic renewal function by clicking the Turn off button.
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Step 4:
Click on the button Close to close the screen.
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Step 5:
Congratulations! You have successfully disabled the automatic renewal.
Check whether the checkbox next to Automatic renewal is set to OFF.