KineMaster Premium subscriptions on Android are purchased through Google Play. If you encounter any problems with your payment, you will need to check your payment method and balance connected to your Google account.

Troubleshoot your payment issues here:
https://support.google.com/googleplay/answer/1267137 

Learn more about accepted payment methods in your country:
https://support.google.com/googleplay/answer/2651410 

If you still need help, please contact Google here:
https://support.google.com/googleplay/contactflow