I'm not sure how that suppose to help. I have 2 cards issued in Ukraine by 2 different banks (visa and mc) and they are blocking all transactins in rub so I'm not sure how changing country on that page will help with anything. I've tried to change it to Poland but transactions still were blocked because it is in rubs. So until they move us away from russians nothing will change.
I've attached my acc to steam and subbed there as workaround. It is pricy in there but worked for me.
Thx!
Also you can try to set Poland country and pay in PLZ. But selection this country depends on region where you live. Some regions (providers) are not allow this selection
