Ehhh you will have to purchase SE's Crysta Points, which is SE's very own currency or points or something, if im not wrong, there is 2 payment type, via C&B and via Crysta, to pay for Crysta, they give you another 2 options which is C&B and Ultimate Pay, since C&B is already covered, i'll move on to Ultimate Pay,
paying with Ultimate pay give you more payment options, because Ultimate pay is also some sort of a point system as well, so you basicly exchanging money to game point A to game point B.
Ultimate Pay you can pay using Paypal, Molpoint and many other option, usually if Malaysia is just either Paypal, Molpoint or direct credit card.
so purchasing crysta is almost the same with purchasing molpoint, the exchange rate of crysta varies depending on the region you pick.
1 Crysta = 0.01 USD
1 Crysta = 0.01 EURO
1 Crysta = 0.01 GBP (Pound)
there u have it!

so yea, those who pay EUOR/GBP are screwed

USD is more cheaper.
Mann this is confusing.. Why don't they just implement direct payment like paypal or some sort.. Just too complicated >.>.. anyway are you playing on the EU server or NA?