Mirraw Online Services — Significant delay in delivery

Placed the Order no M[protected] on 17 July and received an email stating that the order will be delivered on 31 July. However, it is 18 August but still not received the order. I have requested for refund and cancel the order but Mirraw is not agreeing. They are saying refund and cancellation can be done only within 24 hours of placing the order. But in this circumstance they have not yet delivered the order so they are required to give refund.