Rude untrained customer service and supervisors!

Mr price customer service reps are rude and unprofessional. I tried making a purchase on their App for the first time and used the promo code. Unfortunately something went wrong and my order didn't go through. Tried to place it again now I'm being told I can't use the promo code because I already tried the first time and even though it failed it counts as a purchase. What kind of nonsense is this? I tried talking to a rep called Nomah on live chat and she just gave me a cold response and cut me off before I could even respond. I tried calling, I spoke to a Njabulo who was not only cold but was condescending as well and when I insisted I needed to speak to his supervisor called Noxolo he would not put me through but instead told me he is hanging up on me which he went on to do. I called again and spoke to Shona who I explained to that I was not keen on waiting on the supervisor (Noxolo) to call because from my experience they never do. I insisted that I be put through to her and was put on hold for almost 10min only to get a negative response. I did leave my details with him and guess what.. Noxolo did NOT call back!

First of all it makes no sense that they say I can't use the promo code if my transaction failed. Where in your Ts&Cs does it say the code seizes to work if you so much as "try" to make a payment. My understanding is if I make a purchase then I can't use it again. Secondly, how in the hell are you training your customer care reps if they have the gall to tell a customer that they are done talking to them and they hang up on them. I demand to see this Njabulo character brought to book. I also demand an explanation as to why your supervisors do not take their jobs seriously. What kind of meeting runs from 11am to end of day. I sent an email to head office and guess what.. No response again! With the amount of money we spend at your establishment this is utter disrespect! Fix this!