Poor quality of clothing

So I placed an online order last week whereby you could purchase a pair of leggings and sports bra for R200 , the order was delivered and I collected from your Centurion mall store. When I arrived home and opened up the package I noticed there was a big hole on the side of the legging which really frustrated me as I can’t understand how items get dispatched without going through a quality check procedure. However yesterday I went back to the store and showed the manager the leggings and asked if I could just exchange for another pair , his attitude was beyond horrific he firstly didn’t even apologize and said it’s not his problem and that if I wanted to exchange I have to pay in R50 as the leggings bought online were a special, I simply cannot understand how you expect the consumer to pay in money just to exchange the exact same pants. Furthermore the service I received was disgusting and you want see me making use of your service anymore!