Not receiving confirmation sms/calls to redeem gift cards

Question

It's hours i'm trying to redeem an xbox gift card with my points. I'm doing nothing different, same internet connection, same devices (my private laptop, cell phone, even my xbox), same account, same telephone number. It's always worked until now. Everything's fine until i reach the confirmation sms/call. I simply donmt receive any, and i can't redeem my card. Can someone help me fix it? EDIT: i've even tried to receive a phone call, or changin my telephone number, but nothing changed. It seems nobody here can receive your confirmation calls or calls, and i need ti redeem my gift card.