Flipkart — Rooster wrist smart band

I had returned the item which i ordered from flipkart and then i also created a refund request then i got a message from flipkart that they have completed the my refund but it is over than 2 month but still i didn't got my refund money back
I have tried and contacted to them again and again but they are saying that they have completed the refund
I had contact to my bank also but they told me that flipkart has not refunded any amount on my account