Central Board Of Secondary Education [CBSE] — Not following the scheduled time by examiner

I inform you sir that the alloted/scheduled time for board examination is not been followed as concern.I wrote my first examination of 10 board on 27 April'22. In classroom the question paper was distributed after getting delayed by 25-30 minutes.
As time is very precious for students and the writing time's starting 10-15 minutes was also in vain because there was no question paper provided. Sir I urge you to check whether it is followed or not as you also understand the importance of time.Due to lack of time my exam got ruined.