Poor customer service

On Saturday 17 November 2018 I went to Wimpy Hartswater with my 10 year old, 8 year old and 1 year old to go and enjoy a meal together. On our arrival we had to look for a seat as there was no waiter who welcomed us at the entrance. A waiter than came with the menus and the reception was well received. We ordered our meals and obviously based on what we see on the menu we than ordered according to the picture and the value of the meals that are offered. We ordered the new R99 special which consists of the quarter chicken and the ribs with bottomless coke which was not on the menu. I ordered the steak and quarter chicken meal that costs R89 we also ordered a breakfast and a kiddies meal but since my baby is only one year old we reduced what was shown on the menu. When we were served our food. I questioned why the R89 meal had such a small piece of steak as the menu said its a 120g steak; ( mine looked more like a 60g steaklet, hence my query) The waiter than requested that I speak to the manager as he was told that it is a 120g steak. The lady by the name of Martie came and on my query she immediately jumped the gun, she was loud and insisted that it was a 120g steak. I told her that what I saw on the menu and what I received differed completely. She than gave me an attitude and told me with sarcasm " how can you look at the picture you are not serious, how crazy can that be, since when do you look at the picture and not the price" I told her but that is what attracts us to buying as we first buy with our eyes before we can even look at he price tag. At that moment the whole attention was focused on us. Everyone in wimpy stared.. She even had the audacity to tell me that I had the option to ask the waiter if I can get a 200g steak instead of the 120g but the problem is that there were no options! So the blame was now shifted to the waiter. The lady was rude and she couldn't care less about my concern. I lost my appetite immediately and because the kids enjoyed the meal they had and they were hungry remained. The bill cost me R364 and I had to settle for less. I am soo disappointed in the service we received especially when it comes to getting different treatment because we see how our fellow customers are treated as opposed to us being treated equally :(