Swiggy — service issue with food and customer care

I placed an order and one item was not available, instead of calling and informing me they just never bothered to do anything. When i called to check why my order hasnt reached, the swiggy guy says that one item is not available and if i want i can call teh restaurant and change my order. It is not his concern that items are not available. When i contact customer care, instead of resolving the issue they just say why don't you cancel the order and place a new one. Last week the delivery guy ate my order and lied that he delivered the order. Fraud company swiggy. I hate swiggy and i am an inch short of sueing this company