Cornubia online department and there terrible service

I placed an order through Makro online on the 10th Sept. It was sent through to Makro cornubia and I have receieved such terrible service. They sent me the wrong product... They are blaming the courier service. They can't see who got my order. Now no one is letting me know what's happening. It's not my problem what's happened. I want the product I've paid for. 12 tins of baby food is not something that cheap and must be forgotten. Everytime I try phoning cornubia no one is answering and they putting down the phone.... When I do get through they keep telling me they will phone back. Please remember this service and remember you will get the same treatment when I refuse to pay the account.