You can use any Visa or Mastercard credit card to buy a GiGa.GG offer.
E-card or prepaid cards are accepted as long as they are co-branded Visa or MasterCard.
Paypal is not supported.
Bank transfers are not available for now.
If you don't have any credit card, you can select the paysafecard option: buy a ticket in a local sales outlet and pay online with the 16-digit PIN printed on your ticket.