I sent in my revb air to apple on Dec 15th. They recieved it and repaired it sent me a email twice that it was on its way back. Called yesterday and they said now that engineering had it because they have never seen a problem like this before. Should this be normal run around I have called several times and not gotten anything. Guy yesterday told me he would call me back within 24 hours and have not heard from him. What should I do?