Branch Manager short changing customer and Bad service

I always receive bad service from your Brooklyn branch and I am tired of their insults. Unfortunately this branch is closest to me as I do most of my shopping in this Mall. This time they have hit my nerve. I was returning an item I bought online and the Branch Manager requested to see the card which I used to make the purchase. Firstly it was not possible because I made an eft transfer from a sub account which does not have a card and since when do you need to see cards for eft payments. Secondly the item I bought was R224.25 and was only refunded R198.55 even after I furnished the invoice for the purchase. I always complain about this branch on you website after sales reviews and it seems like you are not doing anything about this.