hi balamaniraja,

you can ask for help from the officer/incharge by requesting them and telling that you have been bymistakenly misjudged it and if the officer is kind enough then he may help you out as he has the authority of everything and can help you out.

hope this helps you out,for further queries you can ask me

have a great day ahead

No the dates are fixed and cannot be altered, whatever be the reason. If you have missed then nothing can be done , accept this and move forward.

One thing can be done that you apply for the second counseling and that will provide you with anoyhandate for the certificate verification.