Bad service

Very much disappointed about service I received at Ackermans mall of the South, Bought my daughter sandles on the 21/09/2020 And on the 1st of October they broke, went back to the store, was assisted by some lady at the entrance who said the won't be problem when I stated my problem. Got to the till assisted by Thato who asked me if I had chose something else to exchange with when I said not yet she then went to call Thabi without even letting us know of being excused by her, When Thabi came he tells me how he can not assist me as I had only the EFT receipt and not the original receipt. I do not get how I can not be assisted when I have a bit o proof of my purchase than nothing!! The quality of the shoes is just so bad!!! I'm disgusted by the service!! The receipt I have has got even the transaction number!!