If you purchase your ZP with zong/boku, dont try to buy 10k ZP with mobile within a month or you might get scammed.
I just try'd to buy today some ZP & they took my credit ( 10€ ) then they SMS'd me after that you cannot buy ZP twice in a month with Zong.
Zong = piece of shit scammers..
This is the same for boku.
200,000 ZP = 1,100$ phone bill dont trust paybyphone.