But there's one good thing on Heyah - data calls works also when your account is active only for incoming calls
So by recharging 20PLN you have 4 months of Internet
Of course you have to have enough money to connect. It's only thing that works when outgoing calls are blocked. After these 3 months for receiving calls better recharge, because they can deactivate your number (sometimes card can work few months after it and sometimes only few days - of course Internet still works, until card logs into network and has credit).