Central Board Of Secondary Education [CBSE] — Mother's name correction from Priya to Pratibha

My self Pranay Raju Kamble, class 10th cbse 2017 batch, rollno 4137589 chennai regional office. i want my mother's name corrected from Priya to Pratibha in my 10th marksheet as per document .hence I have provided all the documents which you have told me, but it seems to not done yet. I applied on 17/10/2020, as its taking much time as i expected so far .

I request you sir to please go through my words and also to correct my mother name on my 10th class marksheet.
yours obediently
respectfully
Pranay Raju Kamble