Welcome to the Roku Community.
If we understand your concern correctly, you have a double charge for the STARZ subscription. In that case, for account & billing concerns, it may be more effective to get help from our Billing team. You can contact them here: then choose 'Account, payments & subscription'. They are the best ones to help you out with that matter.
Let us know if this does help the issue you experiencing or not and we're glad to assist you further.