Message when App Store has payment issue

My app was rejected by App Store three times for the following use case:

  1. Users start payment process,
  2. App Store has payment issue with the users and stop the payment.
  3. The app shows "Payment not Completed" .

Apple says that I should not show that message but does not tell me what message to show.

I changed the message to "Payment Failure". Apple rejected my app saying the message is not correct.

Then I changed to have no message. Apple again failed me.

I am desperate. What message/UI should I show in this use case?

Message when App Store has payment issue
 
 
Q