Central Board Of Secondary Education [CBSE] — Not getting enough marks as get in pre board exam

Hello sir
I am ROSHAN KUMAR SINGH from class 10, roll no.22244912 Adelaide convent school sampatchak, sohagi rampur, patna, BIHAR.
I got 62.4% marks in my 10th board examination inspired of being a bright student of my class.got this marks I am, highly dissatisfied as not matched with my pre- board performance (I got 88% in my pre- board).I always got very good marks in my every term examination.
So I requested you to kindly look into the matter because I strongly doubt the marks I got.it causes death of my career and my future.
It's a humble request to please do justice with my performance and my forthcoming future and re check and evaluate the marks once again