www.indiafloristnetwork.com — Items not delivered in time as promised in website

I had placed an order (order No: FN-[protected]) for Mothers day with www.indiafloristnetwork.com on Saturday 7th of May at 9:30 am. The website has guaranteed delivery on Mothers day i.e. 8th of May. But unfortunately they did not keep up the promise. I followed up for the delivery with the Merchant on 8th of may evening around 9PM and had told them if it is not delivered on 8th May please cancel My order. The merchant assured that the order will reach on 8th itself. But today it is 9th of May and till now the gift is not reached and i dont want the gift any more as the ocassion is already gone. I once again requested the merchant to cancel the order but he is saying it is already in way and hence cannot cancel. I have asked the receipient not to receive the order as it is not delivered as promised. Now I want my money back for the placed order. Please help me in this regard. Please let me know if further details are required.
Thanks and Regards
Kumar