Bad customer service

I bought an adidas t-shirt and a puma jogger at the Mthatha Plaza branch. Only to find out that the items were torn. I went to return said items with the proof of purchase and I was told that since I wore the t-shirt it can no longer be exchanged which is fine albeit a predatory practice. I did not wear the jogger at all as it was too small but I was told that it was also torn therefore it is also my fault for not checking the items before I left the store. They told me the supplier declined the exchange because there is no way that they can tell whether or not the clothes were worn despite the jogger still having the tags. I can accept that I did wear the t-shirt but as for the jogger it is ridiculous that I am being penalised for a defective product and arent even allowed an exchange for the correct size atleast.