Poor service from Haasendal Gables MRP store

Hi. Hoe can I get hold of top management? I have been shopping at Haasendal Gables MRP since the opened and did many purchases both cash and on card and store card. Out of all of them only one was a good experience. 70 percent of my visits they only accept cash and no this is while there is no loadshedding. The systems is always offline!!! It's been nearly a year that this shop is open. Then I have made payments with my card app which is the biggest in south Africa and I use it at ALL shops including edgars and dischem and clicks etc. I have twice purchased with this app at Mr price at Haasendal Gables and also Tygervalley. Today the manager refused it and said I cannot use it. She also did not want to accept me only giving the account nr and also not the ID. She then said I must use the MRP app. I then in the shop downloaded the app and scanned the purchase but it did not work. Then only I was told but their systems is offline and have to pay cash. This after struggling for 30 min inside the shop to make the purchase. I left the goods and I will never go back again. Why is shopping at Mr Price Haasendal Gables ALWAYS a challenge? I also find the manager being rude and not helpful. I really would like to see what Mr Price is going to do about this?