For years, I’ve used the DTAC app (iOS) to pay my cell phone bill with a U.S. credit card. Until recently, the app has been reliable and rock solid for me; never a problem.  However, for the past seven days, I’ve been unable to make a payment using the app. The following error message appears every time:

 

 

Is anyone else having this problem? BTW, I’ve contacted customer support - both by phone and by Facebook messenger - and no one seems to have a clue. I’ve tried uninstalling and reinstalling the app and power cycling my phone to no avail.

Update: After eight straight days of inquiring with customer support, problem appears to have been resolved.