Bad service at Samsung

I have recently been to the Samsung store in pavilion. I have purchased a tempered glass for my phone and was not happy with it because it was defective. The salesman had tried on 3 different glasses and all were defective. I then asked for a refund because I could see that all their stock were the same. The manager then says to me that they do not do refunds . He got angry with me. I then said to him that according to the cpa act I can get a refund he kept arguing. They have a sign by the till saying that they do refunds but the money will be transferred into the customers account. Honestly this store manager has no way of speaking it seems like he gets angry very fast. To my opinion hes not very knowledgeable and does not have the s****s to be a manager. How can such a big company like Samsung employ such a person to be a manager? I did not get his full name but I know his surname is Naidoo and that he is the manager. Pathethic service at Samsung Pavilion. Would never buy from there again and I don't advise anyone else to either.

Thanks