Name discrepancy and upsc

(For upsc)Sir, there's words mistakes in candidate  name please help what to do 

Class 10th marksheet name-VISHANU KUMAR PANDAY

class 12th Marksheet name-VISHNU KUMAR PANDEY

here you can notice there's a extra letter 'A' in class 10th marksheet in VISHANU

And 'A' and 'e' in pandAy and pandEy.. 

And CBSE office denied for name correction 

So what's the solution for this is? 

Is affidavit is enough or Gazette or something else? 

I can maintain other documents as you suggest to what class should I go..

My graduation name is same as class 10th

Sir, I am searching about this from about 3months but anyone not telling exact answer I'm in so panic

It's very polite request to you please help sir 

THANK YOU SIR