I don't know for adobe specifically, but other services like for example spotify, require that you also pay by a card issued in said country. So the VISA from your homecountry you already have, doesn't work.
VPN could be determined by the IPV4/6 blocks that was allocated to them.
My bet would be to use residential socks proxy.
In terma of cc, Maybe turkey paypal?
General tips: Don't login from non turkey IP (phone app could leak your IP even when app is closed for example, app sometimes pull/push data when closed ).