help pls my sms pins arent workin

ok i went to the att store and got 4 pins(on the iphone) i was testing the pins out by changin the country and so it was legit so i switched back to u.s.a country now all it keep saying is "invalid payment for pin" wtf help pls (2 of the pins i used on 2accs alreeady)

 

The other 2 are probably Pay By Phone.
I'm not really sure but I've had once saying something like I had an invalid payment booth or something like that... I just had to change the SMS Pin into Pay By Phone & redeemed it.