As of my experience you can't change a country for Adsense, while I can arrange a way to get the money from that adsense. Have you got your pin verified letter received? Let me know or shoot me a PM
As for changing adsense country, they don't allow that instead they require you to close the account and open a new one in your country of residence. To get your cash, your best bet is to open a payoneer account which will give you a UK bank account to receive your moneyThis is an old account and I had payments on regular basis. I have open the account on behalf of a friend of mine but he is not available atm. I have put a hold on the payment.