Cancelled what service? Did you cancel your subscription using this information? Manage your Apple Music subscription on your iPhone, iPad, iPod touch, Mac, PC, or Apple TV - Apple Support
If you do not cancel the subscription through Apple, you will continue to get charged. Cancelling your cellular service does not cancel any recurring subscriptions.
You may also want to check the instructions here to see if you have any other subscriptions with Apple, View, change, or cancel your subscriptions - Apple Support