Boat — I have not received product after picked up for replacement

My bluetooth earphones were picked up at 18 th may 2021. I haven't received my earphones after reaplcement. I have mailed to the thread several times. I didn't even get a single reply. I tried to call customer care, every person tells a different story. Just like fooling me. And now nobody even picks up the call even after staying I'm the queue for hours.