To change your subscription like upgrading to the Gold Pass, or to turn off the Auto Renewing:
• Open the Settings app on your device
• Scroll to and tap on iTunes & App Store
• Tap on your Apple ID
• Tap "View Apple ID"
• Tap on Subscriptions
• Tap on the Video Star Subscription
If you don't see your Video Star Subscription, chances are you are logged into the wrong Apple ID so tap Done, Sign out, and Sign back in.
• Tap on a Pass to Upgrade or to resubscribe
• To turn off the Auto-Renewing, tap Cancel Subscription
• You can see here when your subscription will end