I had a Post Office box number as my billing address, and when I tried to activate my sim card I'd get the payment failed message every time. After about eight days, 20 messages with the Public Mobile support team, we were going around in circles. ...
I solved the problem, apparently Public Mobile doesn't like PO Box numbers for mailing address to match up with your postal code, so I used a physical address and I got activated.
I am having the same issue. Been getting the payment has failed. Please try again later or use a different payment method error for at least 5 hours. My CC wasn't charged, and I've tried a different web browser, I cleared cache, I used the incogni...