I have Norton 360 premium on my PC but one one of my phones the Norton 360 is being charged separately. It has charged my credit card for renewal. I thought this was included in the Norton 360 premium package on my PC??
Did you previously have a separate subscription to the mobile Norton security? If so, that would get renewed unless you have turned off the automatic renewal for that subscription.
If you paid the App Store for the subscription for your device, you need to request the refund from there, and cancel that subscription.
For iOS subscriptions....https://support.apple.com/en-ca/HT204084
For Android subscriptions...https://support.google.com/googleplay/answer/2479637?hl=en
Then you should uninstall 360 from the mobile device and restart it. Then go to the App store for your device and install Norton 360. During the installation process, look for a Sign in or I already have a subscription link. Tap on that and sign into your Norton Account to activate the app.