payments

i just want to know if i buy lapiz rank for $20 and i want to upgrade to diamond rank, will i have to $50 or will i get something like a discount?

Hey, i am from venezuela. my languaje is spanish but i speak english also. my question is that if is posible return paypal with payment method. In my country is impossible buy any rank. The only method in my country is paypal. but this is no accepted by cubecraft. before yes but no now :(...