Ugh what a frustrating problem. Nobody from QR will be able to help you, as this an AA ticket on a flight operated by AA. I am a bit surprised the Twitter team couldn't help. I would try EXP desk again if you are able to do so by phone. Otherwise, head straight for AA GAs when you land at DOH. You also likely won't be able to get into Al Safwah unless/until this is resolved.