Many people think that, having exhausted an exam board's apeals procedures that is the end of the process. In fact, the next step is the Examinations Appeals Board if you wish. If you look at their website, you can see results of previous appeals, school by (named) school, board by (named) board, subject by (named) subject. There are several Drama appeals. Their site may be worth looking at, and the timeframe for lodging an appeal with them noting.