[VIP Membership] Cancel my subscription

You would need to go through your iTunes subscriptions page to cancel your PicCollage VIP membership.  
  1. Go to Settings > [your name] > iTunes & App Store.
  2. Tap your Apple ID at the top of the screen, then tap View Apple ID. You might need to sign in with your Apple ID.
  3. Scroll to Subscriptions, then tap it.
  4. Tap the subscription that you want to manage. ...
  5. Use the options to manage your subscription.

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