No refunds and bad service

Bought a double rack of ribs. When I got home, I was shocked to see the small portion of ribs they claim is a double rack. I drove back and asked the manager if they were sure they gave me right order. He said yes. I then told him I was not happy and wanted my money back. He left the counter to fetch a lady from the back office. She came and looked at the product and said it was right. She then closed the box and told me she wont give me a refund. By now I am livid and told her I will complain with head office. She was unfazed by this and told me to go ahead. I am shocked and upset by their attitude on the whole matter. I have photographic evidence which I will post.