Reliance Mart — Not giving refund

I had ordered products on 17th, done online payment. But few items were not delivered, these people haven’t refunded the amount for non-delivered products yet.
Why the hell are these people showing the products online which are not available in the store, to eat our money?
I have been chasing them since 17th, no response yet! We are not asking money from your pocket, it’s our money which we had paid and the products were not delivered!