is there a free trial?i also would like to say that i tried buy credit with my credit card but i didn’t understand anything because its all in Korean Language, i didn’t find where to choose my credit card…
Umm… When I checked your account again, it seems your setting is ‘English’ and you already bought the mudfish credits. 
Please let me know if you need more help from me.
oh! i find out how to pay using paypal since i coudn’t use my credit card