Hi Muzammilsaiyyad,

The best way is to get your PwD certificate corrected. This is really important and you will need it in getting any kind of advantage from the government.

If that's not possible in the limited period then you should consult some people involved in official paperwork and ask them that will any affidavit help in solving your problem. 

 Hope it was useful to you and your query was resolved.

Feel free to contact us for any queries.

All the best :)