Flipkart - Did not got product after 20 days of order

I placed an order on the *th of August. The expected delivery date Flipkart showed me was **th of august. But on **th of August, the date was extended to **rd of August without even informing. I called them so they told you will get your product by **rd August. Again on **rd, they increased my date of delivery to *nd September without informing. When I called them on **nd they told me that I will receive a call from Flipkart for resolution but I did not get any call from them.