Ajio - The material was taken but it s exchange was not give

I wanted an exchange of my cargo joggers pant with elasticated downstring. The delivery women took the pant from me but didn't gave me pant. And told me that it would deliver to me after some days. After some day I tried to track it but it showed me delivered. I didn't get the product. When I called on costomer care they told me that they can't do anything regarding this