Cashkaro — Cashback not received

I orderd headphones from boat I got cashback of rs 85 pending but the product I recieved was defective so I just replaced it but cashkaro is telling after 1 month of that I cannot get my cashback as I cancelled the order but I didn't they are not responding to emails I share with them the delivery status from courier company the order screenshot from boat website even screen recording of that but still they are not responding