Customer service at it's worse

I am looking for assistance as Pick n Pay Promenade has been absolutely useless and has the audacity to tell my mother to go sit at the day hospital for something that happened in their store.

Two weeks ago, my mother slipped at one of the fridges at Pick n Pay Liberty Promenade Shopping Centre and hurt herself. The staff took her number and promised they would call her the next day. Of course, they never did. This happened on a Friday.

My mom told me about the incident on Monday, and I called them immediately. They kept promising to call her back, and I had to follow up at least 4 times before they actually did. When they finally got in touch, Customer Service Manager Washiela had the nerve to tell my mother that she needed to "look at her surroundings" and suggested that she either go to the day hospital for help or "ask her son for money for the doctor."

There was no sign of any leakage around the fridges—only a sign under the fridge after the incident. The staff only ran to put up a sign once it had happened.

Is there anyone I can reach out to? Because Pick n Pay Promenade has been completely unhelpful and dismissive.