Poor customer service from the Manager n her staff. Worst experience

On Saturday I went to Jet Mall of Africa and bought 6*dresses, on Sunday wen I fitted one of the dresses at home It was a bit tight so I decided to take it back. On Monday I decided to send a colleague of mine to do a refund at jet Eastgate as it is close to my work place. I gave her my debit card that I used to purchase the items to present it to the cashier and explained to her that they will give her cash as you can't refund money on debit card. My colleague went to Jet Eastgate and the cashier ask for a card to do a refund. She showed the cashier the debit card n explained to her that this is a debit card, the cashier insisted that she want to refund bk to the card and called her manager on duty. My colleague called n explained to me the situation as they were shouting at her, I asked to speak to the Manager over the phone. The lady was rude to start with it was like she is talking to her 4 year old not a customer. She did not listen to me she kept insisting that she needs to follow her procedure why would I want cash if I ddnt pay with card. I was never given a chance to explain anything , she went on n on talking then she finally gave my colleague her phone back without say anything to me.,all I can hear is the manager n her colleagues on the other end shouting n screaming saying some nasty words in front of my colleague as if she is not a customer. I'm disappointed in a manner that a manager of jet will speak to a customer with that kind of attitude. In this time of Covid 19 with people loosing jobs and companies closing down we still have ppl who dnt value customer service or jet is making so much that they dnt care if their customers return. I know this might not mean anything to her n her colleagues coz they getting a salary every month but the are ppl out there who will do anything for this job that they playing with. I will never set my foot at jet ever, with my hard earned cash I would love to shop in a customer friendly store. My proof of payment was taken with the refund done by cashier Duduzile Tembe n I would like to have it back for the rest of the items I have at home. I'm not willing to set my foot in that store. The staff in that store from the manager need customer service training.