Reliance Trends — sweatshirt

I have ordered sweatshirt of worth 900 on 29 june. I have received a men's tshirt of worth 399. This is the 2nd time i have received wrong item and last time i didn't get the refund after returning the item. Last order was on 28 may. I paid through cod. I have called customer care so many times that i am fed up with that. They don't even lift the call. Why do u even keep customer care if you can't maintain it.