I can't change my country/region of residence on my account

I want to change my address on my account. Initially, the account was created by a friend, but in the end it was given to me a very long time ago. I did not plan to change any information, but now it was required. I live in Ukraine, the automatic region does not change and the Russian technical support could not help. Is there any way to change the region? I can provide proof of identity