@Maureen2323
Did the payment system not process your card info at least twice....then you activated it online and came back to try again and it was still refused ?
If you have not tried to update your card info for at least one hour then clear your browser cache or the pm app cache and reboot your device and try again.
Take your time and try not to make an imput error. If you do clear the entire line and start fresh. If you make several errors (trust me I've done it!) then clear your cache again and start over from the start.
I have found that the new self serve account's login and payment details will return an error message if you make any typo and you correct it using the "back" arrow key on your keyboard. Deleting the entire line and starting fresh will prevent the error message the vast majority of the time but several errors in a row will require clearing the app or browser cache. Report back your results. 🤞
