Shocking service, guess the customer is an option irritating extra at Clicks Ladysmith KZN

On 7/1/20 I went to my local Clicks branch in Ladysmith KZ to collect my chronic medication for cholesterol.I was rudely told by the attendant that the factory has not produced and they do not have stock. This is my problem and they cannot help. when i questioned her on this she turned to a colleague and spoke about me as if I was not present " how can i explain to this guy that we do not have stock and its not our problem. Surely you do not that customers like this??? or does Clicks not care?? I email a formal complaint to "Service@Clicks" <***> where I got a response and tracer number to stay that I would get a response within 48 hours... guess what no response 72 hours later. I have since spoken to several other clicks customers who complained about the rude service at this Clicks in Ladysmith, the endless shortage of cashiers at peak periods 2 cashiers but 6 tills available and a waiting time of 18 minutes.... Also raised this with my GP who stated that all medical specialists complain about this specific brand of Clicks and they lack of stock and service.. I have emails Clicks again on:"Service@Clicks" <***> but undoubtedly there be no response again.