National Institute Of Securities Markets [Nism] — Refund for cancelled examination

I'd raised 2 requests in december(#372496 & #372911) on NiSM platform. I had enrolled for "NISM-Series-XIII: Common Derivatives Certification Examination" paying INR 3000 scheduled on Apr 25, 2020 with enrolment number [protected] which was cancelled due to covid-19 pandemic. I wanted to appear for "NISM-Series-I: Currency Derivatives Certification Examination" and "NISM-Series-VIII: Equity Derivatives Certification Examination" since these 2 are available online & serves the same purpose as that by common derivatives certificate. I had initially asked to register me for these examinations as both tests together cost INR 3000 but I was told it was not possible at their end. Then one of their customer care representative had asked me to send a mail asking to cancel the registration & refund the amount & then I can register for the required examinations. Post that there was no communication from their end. & because my certificate had expired I had to appear for new certificates with enrolment numbers [protected] and [protected]. Now, I am being told that there won't be any refund. Can you please look into the issue. They were not willing to internally manage & enroll me to online available examinations which cost the same & neither they want to give the money back.