Can't download Authenticator - Not avaiable in your country

Im really frustrated that since start of Wotlk Classic you didn’t fix the Authenticator thing that allows you to write in description in LFG ingame to be avaiable in all countries. I am from Montenegro and my friends and i can’t download it from App Store as it says its not avaiable in your country. If you can’t fix it atleast fix it that we can write in LFG description thing asap.
Thank you