Unhappy customer

I had such an horrible experience at Istore Somerset Mall. I went to Istore Saturday to have the iPhone booked in. A sales person assisted me and scheduled the appointment for Sunday the 9th Dec 2023. I took the phone in on the Sunday and then another sales person assisted me he said mam you are not booked in at Somerset Mall. The previous sales person made a mistake and booked it at Tygervalley instead of Somerset Mall. At this point I was already livid and I have asked to speak to a manager. Eventually after 10 minutes a manager by the name of Tasneem Collins came. I have never met such a cheeky and unprofessional person with an attitude, define not friendly but rather there to scare customers away . I have explained to her my situation instead of assisting me she says it’s not the sales person duty to assist me with bookings and making up excuses for what has transpired. I asked her to assist me with collecting the iPhone as I am not going to wait for a technician when I have booked the phone in. She refuses to see my point I asked for the area mangers email address which she also refused to give. I am utterly shocked and disappointed with this kind of costumer service.