Bad customer service

The customer service at pep, bloed mall is very very bad, only one lady was assist such a long queue, I think her name is Eunice if I'm not mistaken and honestly nobody cared, one customer, a male complained to this other lady with short hair, her response was so unpleasant, anyway I bought two pairs on promo, I wasn't aware of this promo, it is not stated anyway that if I buy two I get a discount as there are two different sizes, unfortunately one pair is small, went back to pep at Madiba st, there was no way I'd go back to bloed mall, the customer service at Madiba was/is good until the other lady, who I assume is the manager said, "when she want to buy, she goes to bloed but for exchange, she comes here😳" are you not one division? Sales wise, makes sense but did she have to? Anyway unfortunately they couldnt exchange for me because I should have brought the other pair because of the discount given, this other pair is already at another province, what do I do? Get stuck with a pair I'm not going to use, please bare in mind I use money to visit the above two stores. Above all the customer service is very very poor, Foresthill was the best.