want my refund please

I went to Mall of Africa to purchase shoes 2 of the same pairs different sizes as we got to our destination I realized that one pair is missing a strap so I had to obviously return. Since I live very far from Mall of Africa and was just passing by that day I went to Ackermans in campus square as it is one store and was sent back to try another Ackermans as it is a damage and will impact their store as they will be on a minus.I fail to understand how that is possible as you are one , the least they can do is contact the MOA store so they take the fall when recon is done that shouldn't be a clients problem.Now I'm told I need to drive all the way to MOA to get a refund there how when they can do that I explained that its far so I will be spending the same amount of money for transport to go there as those shoes.Can someone please assist because next thing the 30 day policy will kick in when im no longer able to get a refund.