Expired credit card charged

Jacobson8:
How is that possible? Is that legal? 

Updater services allow merchants to know when your credit card information changes, and to alter their records accordingly. If you don’t want to continue the subscription, you’ll need to cancel it directly.

https://www.creditcards.com/education/recurring-charges-updater-1275/

Please see your Norton account to manage licenses / subscriptions.
https://my.norton.com/extspa/account/subscriptions

Please check your Norton account to confirm ... Automatic Renewal Off ... and no billing information. 
MY SUBSCRIPTIONS reports:  Activate Subscription Renewal ... with Automatic Renewal Off.  

BILLING INFORMATION reports:  There is no billing profile saved in your account ... with no billing information.

Stop your Norton subscription from automatically renewing
https://support.norton.com/sp/en/us/home/current/solutions/kb20090818144126EN

Online Refund Request
https://support.norton.com/sp/en/us/home/current/autorenew

Refunds for Norton annual subscriptions
https://support.norton.com/sp/en/us/home/current/solutions/kb20100512172507EN

Learn more about your automatically renewing subscription
https://support.norton.com/sp/en/us/home/current/solutions/kb20080417115558

When you stop your subscription from automatically renewing:

• Your subscription will continue through the end of your already paid subscription term, after which it will end and not automatically renew.

• It typically takes a few hours from your request for the change to take effect.

• Any benefits associated with automatically renewing subscriptions may end when you stop your subscription from automatically renewing.

After cancelling your recurring subscription, your subscription will not automatically renew.  Your protection will continue through the end of your current paid term. 

After cancelling your recurring subscription, your subscription will not have the Norton Virus Protection Promise.  Your protection will continue through the end of your current paid term.