I just bought a Koodo sim card for my unlocked iphone 6 at the mall today. I paid $90 for the prepaid cards with an add on. The guy at the shop told me to activate the sim online. When I try to activate the sim, it asks for a payment method near the end? Why is it doing this? I've already paid!! On the receipt it gave me a pin number and a serial number but I literally cannot find anywhere where i can input these things on the website to activate the sim. This is beyond frustrating, can someone help?