Worst customer service fr a clueless manager Clearwater mall

I have been waiting to upgrade my two contracts since October last year, Telekom has iPhone on special but they always don't have stock instead they refer customers to iStore where we are subjected to pay a fee for upgrading at their store and additional fee of R20 per month x 36 monhs. I then decided to walk to a Telekom shop to find out the reason behind an additional R20 and to ask why do they advertise something that they don't have, the store manager by the name of Simon Ndaba was not helpful at all, according to him everything is beyond his control, he doesn't know why Telekom doesn't have stock, he instead referred me to some number that I should call without explaining anything, I insisted he takes my number down and update me tomorrow since I believe he is Telekom and he cannot refer me to somewhere else, he blatantly refused and said he doesn't control Telekom, when I told him, he is the one that is subjected to the backlash since he is the ce of Telekom, he told me he is not the face of Rekom and insisted I call the numbet and refused to further assist, an augurment ensued, we both shouted at each other and one of his colleagues came to me to tell me to keep it down but said nothing to Simon, I told him now that he can tell me to keep it down, he can also educate his boss about customer service, he simply walked away without saying anything to Simon. Simon doesn't seem to know anything, he is one manager who is not bothered, everything is beyond his control, he even told me I can go ahead and report his behavior to Hello Peter, he doesn't care, I left and went visited 3 of your competitors including Incredible connections, I didn't get to speak to managers but all their employees know the reason why there is shortages of stock and the reason behind the additional R20 charge, they all took down my numbers and promised to call me when they have stock and they even went to an extent of telling me when they are expecting stock, after all I don't think I want to deal with poor customer service and clueless managers from Telkom, I will have to cancel all my contracts and look for services providers who know customer service, who are the faces of their companies and who represent their companies not refer me to some number and when I asked what is this number for, I got told "I thought you should know" afterall common sense is not that common, you cannot expect one to understand by giving them a number or maybe I'm plain stupid