I did not receive what I paid for

I ordered a large pizza plus a 2 Litre Coke Online. The delivery was done 1 hour 55 mins later, without the Coke. The delivery guy could not even explain. The next day I sent a message via the Debonairs website and also via their info@ email address, but nobody even responded till today. I am not demanding anything outside the ordinary, I am simply demanding what I paid for. I paid but never got the drink I paid for, lets put aside the disappointment for the delivery delay. If this is how your service has degenerated to, your competitors have no competition for long. Disappointed.