hmm...ok so the Cards you see on that screen is about the "Logos" , that's it selecting the kind of logo you want to be shown if any, that's all.
As for paying through CC, Paypal itself once your customers decide to purchase through Paypal they can either login and then pick a card from within Paypal, or they can pay using a debit/credit card without having to have a paypal account, that's how Paypal Express works.
So just hide the "Credit Card" (turn it off) and that will give your customers a single option to pay which is through Paypal, and they get the chance to pick through which means from within Paypal.
We also have some different gateways that might work on Bulgaria (like local gateways) but are still under beta testing
Hope that helps!