Best way to top up Heyah outside Poland?

[Motel75]

Thanks, Przemolog, that worked very easily. There's even a slight discount and a registration bonus, so I paid 146 for the second refill instead of 150 (which, all things considered, will result in a rate of something like 7 eurocents/min to any number in Europe!).

I'm not sure this topup service is very useful for people who don't have a Polish bank account, though.