NEED HELP GETTING NX!!!!

Hey guys im having this problem buying nx with paypal on internett i cant get nx game cards because im aussie but every time i open up billing service it say like billing problem or somthing then get out of it and wont let me buy NX and i rly wana get sg556 permanent so i need help asap if you know how to fix this!!!!!
please thank me i like being thanked makes me feel special.

i added screen shot of what pops up download if you think you can help me.

Can you go into more detail? Its pretty brief
Screenshot and ill take it from there.

Well... Im aussie too. My problem with paypal was that i lied about my age, so i could use paypal (im 14 xD), but on CA i said im 14 (correct age) therefore it wouldnt let me coz it thought there might be a problem with it. xD Stupid fkin nexon.

Well you have to be 18 for PayPal, Nexon ID has to match Paypal Age. So if you make another account and get the NX on it you could gift the NX to your main character.