Worst customer service!!!

It is with great disappointment that I have to write this review. I received such poor service today at the Springs Mall branch with a rude consultant! The reason for my visit to MTN was to purchase a sim card for UNISA. As far as I know the sim card was not meant to be registered (RICA) and so I went to the branch without any FICA documents because I am not a UNISA student nonetheless and I was purchasing the sim on behalf of a student since we were under the impression that it was not meant to be registered. I waited in the queue to be allowed in and as soon as I reached the door I was attended by Chantel who then told me that there was a new communication from UNISA and the latest was that the sim card has to be registered which I clearly didn't receive. She then told me to go get the proof of address while she keeps a spot for me so that I may not queue when I return with all my documents. I then left to go get the UNISA student whom I was purchasing the sim for to rather register the sim card in her name instead of mine to avoid confusion. when I returned I explained to Chantel that rather the UNISA student enters to purchase the sim instead of myself since she had kept a spot for me and I will no longer enter and she refuses telling us that she kept a spot for me and no one else! she allows me to enter but when I speak with the consultant they advised me that I cannot purchase the sim card on behalf of someone else so the owner needs to enter to purchase the sim herself. upon returning to the door she continues to be stubborn in this regard and telling the person who needed to enter in the first place that she doesn't listen and she will not enter. She was very rude in her approach with no appropriate manner in addressing the customer to the point where we told her that we will go to another MTN there are many branches we could use and she responds that she doesn't care we can do that. I see no reason for her refusal since I decided that somebody else can take my spot. She should rather have not promised to keep my spot in the first place if she would behave in this manner! I don't know why she acts as though we were trying to enter the store together! and secondly, the customer service from her was extremely disgusting! I never want to use that Springs Mall branch again due to this! there are ways in addressing a customer appropriately and with manners also using an appropriate tone of voice! I have been to the Branch in Carnival Mall the previous week and I must say the service was extremely excellent! I am too dissappointed with MTNs customer service! Very poor! The sim card was required for use with immediate effect as the UNISA exams are underway! Since there is no sim card, it is now a huge inconvenience and costly as we will have to resort to alternatives! I had not expected this from MTN! extremely Poor! I cannot begin to explain how dissappointed I feel with MTNs service.