Firstcry.com — Product Not Delivered, But marked as delivered

We had ordered 2 baby carriers from firstcry.com however we only received one carrier.

We had a doubt looking at the box, owing to its weight and size to hold 2 carriers. But when we open the box we found only one carrier but invoice for both the carriers also in app both products we marked as delivered

When we connected to FirstCry customer care they say we have sent both the products.