I have the same problem! I am planning to move to England next month so I selected UK (as it is only some weeks and I will left Hungary) but recently I am at Hungary with an hungarian mobile number, but now I can not verify my phone number.
Can you please change my country to Hungary?
I checked this and you Country of residence is already the United States. We'll have one of our agents reach out to you shortly to assist you further with your phone verification concern.