Returning of purchased goods

A couple of weeks ago my mother bought 2 pairs of leggings. Seeing that she lives on a farm, quite far from town, it was only when she reached home that she realised she was not<br> satisfied with her purchase. Last weekend she gave it to me to return, seeing that time was running out and she wont be able to reach a Foschini in time. As I am a teacher I only had time during the afternoon and on Tuesday I went to exchange the leggings. I was informed that they can't help me because they are offline and will MAYBE be back online on Thursday. Today we went to Kimberley and at that Foschini I was informed that I am 2 days overdue with returning the purchase, so I am unable to do so. But if Foschini was willing to help me manually in the first place this would not have happened?!? Cant there be a little bit of understanding from a big chain store?? I can understand weeks but really 2days!? So now I am stuck with leggings that not me nor my mother will be able to wear?!?!?! What to do???!