Swiggy — Order number[protected]. Delivered wrong item

I ordered nutty chocolate jumbo jar desert from Frozen Bottle’s outlet at Byculla for worth rupees 277. Swiggy charged me for jumbo but delivered the regular one. When I asked for the refund, the customer executive refused to refund.
I want an action against swiggy for cheating on customers. They are making fool of innocent people and looting their hard earned money.

I want my refund with compensation