Credit Card purchases

Hi there I have a problem on Galatuer realm my CC does NOT work at all so when I select say a 25. dollar (canadian) pkg the screen does NOT go to a page were I can purchase it just stays all unfocused and i try to hit payment again and same deal. Now I put money in my steam wallet thinking that would help and it didnt so what can I do so I can purchase something off of the store. TY am waiting patiently for some help here or I cant play on I need gems NOW.