Nykaa.com — the order was not delivered and i have not received a refund even after 25 days

I still have not received my order or the refund. I contacted the customer support via mail and call on 8th, 18th, and 23rd of may and i was promised refund within 24 hours all those times.
Is this the kind of support you provide your customers?
I am highly disappointed by the service.
I was a regular customer and i lost all trust in nykaa. I will also suggest my friends and colleagues not to use this app again because of the worst ever support you provide.
I even mentioned i have proof that the order was not delivered.
Its been almost a month since and still mo proper response from your end.
I want a refund asap.
Its not very likely for such a brand to exploit their customers and make profit.
Will also be raising a complaint in national consumer complaint forum