Pepperfry — Cancellation fee

I ordered a bed (Rs.39000) from Pepperfry after being misled by the company about the 25% cashback, which they claim to be equivalent to as many rupees, but tell you nowhere that they expire within 7 days and can't be redeemed fully in subsequent orders (only 25% can be redeemed each time).

As soon as I realised this pathetically sly scheme, I tried to cancel the order, but they are changing me 2.5% of my order value (Rs.975), despite the cancellation being done minutes after the transaction! On top of that, they claim that the money will be refunded to the original source within 2 weeks. I've paid through credit card, why should I let interest accumulate for 2 weeks because of the company's dishonest policies?

My order needs to be cancelled ASAP and the full amount refunded immediately. Order Id[protected]