Bad customer service from a cashier and a manager r

I went to ackermans today to do an exchange on school shoes and 2 pairs of slippers for my daughter's and i didn't have the receipt for the 2 pairs of the slippers shoes that i bought at ackermans mall of Africa. I asked them to assist me because 1 pair of the shoes were damaged and they didn't have stock so i can exchange, so i asked them to refund me on my account and they told that they can't because I don't have the receipt, they just said to me i must take them back to mall of Africa. I had the information of the date and the transaction number of the 2 items but still they insisted that i take back where I bought them. My point is that i had to make a call to mall of Africa to ask them to reprint the receipt for me with my cellphone, which I don't understand why we have managers and still they can't do their job of assisting customers. Poor service i got from that shop that I will never do my shopping in that branch again. I have an account with ackermans but im being treated like i don't matter. Please make sure that when you are at work assist the customers as best as you can because i believe you are there for them and not for anything else