iStore Centurion- Pathetic Service!!!

I am receiving pathetic service from instore centurion!!!!! After many weeks of trying to upgrade and failed because the MTN systems in iStroe Centurion is down the whole time, I finally got someone to get back to me on an online application to upgrade. Unfortunately this consultant provides limited information and has a lack of communicating properly and after a massive hassle everything was approved. Except I still have not received my device, I upgraded on 12 July !! Delivery was said to happen on Friday 15 July!! Following up with the consultant did not help at all because they didn't even provide a tracking number, my e-mails just get ignored, I don't get feedback, the line of the consultant is now unavailable the whole time!! Why do I the customer, have to waste my minutes on endless phone calls and my time on chats with customer service and all I get is that someone will get back to me yet they never do!!!! It is ridiculous that NO ONE can provide me with feedback and that this is the level of service you are providing! It is shocking!! I am not at all satisfied with this level of customer service and it is really frustrating to deal with!!!!