Receiving SMS both depends on Binance and also your operator. I have had loads of issue receiving international sms for verification when I used a certain operator in my country, but that problem disappeared when I just port my number to another operator. It is not wise to use SMS authentication when you already have other great options like Google Authentication 2FA. I suggest waiting it out to receive a reply to your support ticket - it might take a while considering that Binance is a very rapidly growing exchange.