Central Board Of Secondary Education [CBSE] — Complaint about board 10 board result

I Pratyush Barai got only 67% in class 10 board exam results.But my result in Half yearly and pre-boards exam was more than 90%.I think the school has sent wrong marks to CBSE or there is some error from the side of CBSE. I request CBSE to look into the matter as soon as possible.

Roll number[protected]
School number -15674
School name - NARAYANA SCHOOL BARASAT (NEWTOWN)