are you applying for the rcmp check from dehli?
or do you mean your in canada and got the fingerprints done there? I belive the RCMP will send YOU the certificate directly and not the immigration department, i could be wrong but thats what happened for me. But i was living in Canada on a work permit.
That process took about 2 weeks tops for the certificate to arrive in the mail for me. Might be a bit longer if your expecting it in dehli.