hii Vipin ,

If you want to a original EWS certificate then do not contact with an agent . First of all you need to read all the condition for an EWS certificate . If you are eligible for EWS category reservation then go to the your local Block divisional office ( Tehsil office ) , then make  a notri on the 50 rupeey stamp paper , and all the condition of EWS category . Then attach your income certificate , Residential certificate and aadhar card xerox to it and also attach a application and a EWS  profarma .  Then contact with your local Block divisional office . After one or half week , they can issue EWS certificate to you . 

Note - Income certificate not a EWS certificate. 

Hope I resolved your query.