Koovs.com / Marble E-Retail — No refund yet now

Address:

40/A Raja Raj Ballav Street Kolkata, Shyambazar

I have made a purchase of rupees 1456 through my debit card on 29th january at 8:34 pm.
However the order got cancelled in their app by itself.
I emailed them as it was a pre paid order and send them my order details.
They responded me through emails only.
After 2days they responded that they are looking after the matter. After 20 days they told me they refunded me the money.
But till date 11.3.21 I havent received my refund back. What a fraud brand is koovs. I contacted my bank too but bank said its koovs fault. I still havent got my refund back from koovs. Please help me.