Hmmm? For me, adding time to offenderconnect.com is as easy as falling off a log. But, I'm in the U.S. The first thing that comes to my mind is that there might be a problem with using your "foreign" credit card. I've read of this being a problem with other transactions. Perhaps you need to call offenderconnect, directly, and see if something can't be worked out. Good luck with it. The calls are relatively cheap, for me: $1.58 for a 15 minute call. You will be surprised at how fast 15 minutes go, though.
Live simply, love generously, care deeply, speak kindly.
Cowards are cruel, but the brave love mercy.
"The purpose of life is to contribute, in some way, to making things better" Robert F. Kennedy