Hi Sidhu,
First of all congartuations for RPRF!!!!!
This is normal course of some embassies to ask documents again so that they can keep record.
Just pay your fee and send them fresh fund proof.
For Birth Cert. You can get no record certificate from civil surgeon office of Mohali and attach one affidavit from your parents and also attach 10th certificate with affidavit.
send your documents as son as posible so that you can get MR quickly.
I suggest you to pay your RPRF as soon as possible so that they can start processing of your file for security and background check etc. You are near by..
thanks.