AA vs 7/2

[Favre[4]]

Ok i was playing this $2 SnG on Noble Poker. I got it to heads up and i was down like 6k chips to 3k chips. I got dealt AA. My opponent got dealt 7/2. I raised 3 times the BB not to scare him away. He calls. Flop comes K , 7 , 2. He goes all-in and i call thinking he picked up kings. He flops over 7/2 and im like omg. Turn comes a 3. And instead of giving me the third Ace in the deck it decides to give him the third 7 in the deck. Grrr.