Disgusted!!

I want to put in a formal complaint with the Makro Cornubia store. I called in on Friday to complain that I had received moldy c***** Danone yogurt that my 2 year old consumed. I sent in pictures and gave my order number on onecart and makro. When I called into Makro Cornubia I spoke to Thabani who was very nonchalant about it and gave me attitude then went on to say he will get a manager to call me back in the next couple of minutes which never happened. Today I called in again and asked Thabani to please speak English because he was being very unprofessional then said "ey okahle kancane Princess". I then asked to speak to his manager Penny who didn't even hear what I had to say and asked for my number and said she would call me back. To say that I am disgusted with your customer service especially considering my child opened and ate a mouldy yogurt that I showed pictures of is an understatement!!!! I NEED SOMEONE TO ATTEND TO THIS NOW BEFORE I MAKE THIS A VERY BIG DEAL!!