For ALL people who still not received Reliance Power refund.

First contact your postal office & inquire about your letter as all refund orders are “Registered post packets” they never lost, either letter get delivered or get back to registrar (karvy).
As any ipo gets 5-10 lack applications but reliance power got 47 lack applications so karvy, Indian post are in tremendous strain to dispatch all refund orders so wait at least a month to get refund from allotment date.

Other options are
1 contact karvy by email/web contact form
2 Write a letter with short details & send to Karvy by REGISTERED
POST not by couriers with correct address.
3 physically go to your local karvy office (they have 100+ offices)