When you click the Buy Gems button, and the payment window appears, you should see all of the Gem options on the left, the payment methods on the right, and your country at the bottom. Please make sure that Slovakia is selected as your country. Once it is selected, Paysafecard should appear on the right as a valid payment method.
If this isn’t the case, please let me know.
I can just order another paysafecard