How to buy fighters in KI

I’m trying to buy fighters in Killer Instinct Store but it wont let me, when I use paypal, they ask me for “add profile address” i do, BUT im not from the USA im from Mexico, what should i do?

Can you add a credit card???

i don’t have any credi card, really hard to use in Mexico

I’m with paypal but this part of the transaction won’t let me choose Contry/Region to Mexico