Changed country and cannot update billing info

Hello there, people. I've been living in NYC for some time with my sister a long time ago and that was the time I made my Apple ID using our address we were living at with the American credit card being formally owned by my sister.Now, I made it back to Ukraine, which is my homeland and stuck with a problem not a long time after, when I was asked to update my billing address to download apps form App Store.

I tried to update it to my billing address here, using my own credit card from Ukrainian bank and local address I live at, but when I do I just get "Your request is temporarily unable to be processed." when trying to proceed with update, but also I am still getting charged 1 dollar for each try. With my country unlisted in the support center I just don't know what to do to change my billing address and if I will see those 1 dollar charges being refunded ever again. With no options to reach the official support, my best shot at this is asking these forums.

I don't want to create another Apple ID, because my current Apple ID is registered on email which I always use. I tried to change the email and register a new Apple ID to the original email, but with no success.

So my only option is to somehow change my billing address on the existing Apple ID. Any idea how to deal with this "Your request is temporarily unable to be processed."? How to proceed with changing the address? And will be the 1 dollar charges return if the address change didn't succeed at all, because I've heard some people say they had to return the money the hard way.

I will appreciate your help a lot.

P.S. Accidentally posted this to the wrong section. I apologize.