Myntra.com — Already returned the product which I asked for replacement now company messaging me to return the product again

Address:

Banglore Karnataka

I ordered two items from Myntra . When I got them I decided to return one and replace another due to size issues . Both of them are paid .Now company messaged me to handover the returned items to the agent on given date . When agent came I handed him over both the items he didn't ask me to give him only that item that is returned by me . Now company is messaging me that I'll get my replaced product only when I'll provide them the replacement of it . Which I had done earlier . I don't have any product now and I'm not getting my paid product . I tried contacting the company from day to evening nobody is available . What should I do now . I'm a middle class person, I m very sad by this behaviour of the company.