Not allowed to enter

On a Sunday morning my wife asked me to go and buy meay so that she can cook, after driving to get to Spar in Zwelitsha, King Williams Town. I get told by security that im not allowed to go inside with PJ pants. I asked to speak a manager and Thulani (Manager) confirmed that its a rule. Nothing is written on the window saying that. Just disappointed in a Big Super Spar like this. Regard Alden Williams ***