ShopClues — Refund not giving

I had purchased a product from shopclues through UPI but within an hour I canceled the order, this was on 18th September 2020.
Shopclues advised that the refund will reflect in 10 days in on 29th Sep.
Amount never came in to bank when I complaint they give me RRN number stating they had initiated the refund kindly coordinate with bank.
When I contact the bank they informed me that this number is not legit and there is no such refund initiated.
I am trying to raise a complaint almost everyday but shopclues is adamant and not giving my refund.