Can't exchange online order

Ordered clothing from sportscene, for some reason their sizing was wrong, I needed to do an exchange, but they don't have a courier to do the exchange! I went to 2 different stores, neither of them had the item as it was an online purchase, TFG online customer services say I can take it back to the store to get my money back , and reorder (which takes almost a full month). I cant re order the item because the price has increased from when I bought it, so I have to fork out another R300 just to get it in a different size, and they have absolutely no solution! Seriously! Even though you have it stated on your website that you're able to exchanges!