Postal Life Insurance [Pli] — Opening Of PLI

I was suggested by one of my friends to create a PLI as i has many benefits so i have submitted request for creation of same through post office and i was informed that only the marks certificate details are sufficient for opening the account, i have also paid the opening amount but now they are asking to submit convocation certificate.

My convocation certificate is pending with the university and i haven't received it yet.

Also i have provided with my employment details along with pay slip but they are not accepting.

i would really like to know that if a well established MNC can provide me job based on my marksheets and i am eligible to pay ITR to Govt without convocation certificate then why cant i get an insurance without the certificate? and why was this not rejected before hand and not once i have gone through all the submission.

Does this mean the PLI is not applicable to the people who do not have convocation certificate.