Flipkart — Not providing services even after prepaid and changing delivery date number of times

Address:	Mr. Shremanth M Designation: Senior Manager Flipkart Internet Pvt Ltd Block B (Begonia), 8th Floor Embassy Tech Village, Outer Ring Road, Devarabees
Website:	www.flipkart.com

I have purchased a product from Flipkart on 14 january. And the distance also within 40km from the seller to me to receive, but the promised date was 23 january but not delivered, i have cancelled my trip on that day even after they provided 26 assured delivery not even delivered one this day also and now they not providing a confirmation date to delivery, and they have cancelled also, plz do the need full
And what service numbers are there is not working