Extremely poor customer service

I bought a chocolate from game, a TIGER BRANDS product. Upon opening it, it was old. I phoned TIGER BRANDS to inform them that the item was rotten. They gave me a WhatsApp nr to send photos with a reference number. It's been a week after sending all this on WhatsApp, but NO RESPONSE. I even tried calling the customer service number again today, but that doesn't even go through. What am I supposed to do with a rotten chocolate? Why doesn't someone from TIGER BRANDS get back to me??? This is totally unacceptable with the worst customer care. TB***