once again i back to the forum to seek help, it seems even started to play this game is not as easy as i might think, so here's the problem

i want to add crysta to my account to make character, but they need me to make clickandbuy account (only one method of payment listed), but it rejected my card in which every other website accept it, so i buy a ultimate gamer point, but i can't convert it to crysta since there's no "pay by ultimate gamer point" as other website listed, what should i do?

Ps: i live in australia if it helps