I got the code and it worked straight away. Good job!
Out of the dozens of sites available, I chose this one because I wasn't forced to sign up for a PayPal account, with its 20,000+-word User Agreement. The payment processor this site used has a much shorter, very reasonable set of Terms and Conditions.
Even though this site was slightly more expensive than some others out there, it was still a fairly cheap way to make my phone (a gift from an overseas relative) usable as a phone in my country, and the extra expense was worth it to avoid PayPal's user agreement.