Hello,

Revaluation means that your exam paper will be checked to ensure that it has been graded correctly or if the marks have been properly counted or not. It doesn't mean that your marks will be increased especially since there is such a huge gap between your marks and the passing marks. If you are sure that you have attempted the exam in such a way that you were supposed to be passed and are confident, then yes maybe there was some error but if you submitted revaluation just to get an increase in marks, then I don't think marks will be increased.

The chances of marks increasing is low.

Hope this helps,

Thank you