Please open TickTick app and try to restore your Premium status:
If you upgrade via Play Store on an Android device or iTunes on an iOS device:
- Tap your Avatar in the sidebar.
- Tap “Upgrade to Premium”.
- Scroll down the screen and tap “Restore” at the bottom.
Contact us at firstname.lastname@example.org if restoring didn't help, and please include your TickTick account in the email.