Provide the account he upgraded before, so he can upgrade it again with the current method. This is how re-upgrades are done. Normally for free, so he shouldn't charge you anything, and you continue using the same account that was initially upgraded. There is no reason for him to refund you anything considering he has 2 working methods and either of them could be used.
@castiel if he is from asia and has asked for an upgrade on his asian account and the method he paid for didn't support asia but the new method does, the least you could do is upgrade his account again using the new method that will benefit him and cause no extra problems to you.
As you stated in the second paragraph, is what i asked him but he flat out refused. If he wanted to reupgrade using the same method, i was giving him another account to upgrade so i could legit pay netflix for the current asian account and use it as normal because that is used by my family and its difficult for them to use a vpn, but he refused to do that as well.
I was trying to accommodate him, but he didn't give two fucks. not a response i expected from someone who was is so widely reputed on the forum.