I want my couch!

Firstly my delivery status is sitting on "on its way* for 3 weeks now and the item has been delivered. They delivered the wrong item as I was not home when they delivered because there was no communication, nothing from them. I got a call saying they are on the way to deliver. I asked my landlord to sigh for the order as I was away. I bought a R10 000 couch, 3 seater and received patio chairs! I am beyond angry, I want my couch and I want it now!!!! The wait was already ridiculously long and now I have the wrong goods! I want my couch or my money!