Upgrade messed up

I called a week ago and spoke to Mpumi to do my upgrade for the new Samsung A5 phone. I got the phone a 3 days later only to find they sent the wrong sim despite me talking about the new nano sim with Mpumi. They took a further 3 days to send me the correct sim and when i tried to do the sim swap was told they cannot put me through as the department only makes calls and does not take calls. I was promised a call the next day being today. I did a followup at 10 am and was told someone will call before 2 pm. Nobody called. I called back and spoke to Regan Jansen and instructed him to log an incident to collect my phone and 2 sims and that i will be waiting the 3 months to move to another network. I have been a loyal customer since 1997 and feel disgusted ti get such poor service! It felt like I was dealing with a government department when i called them numerous times over the last 7 days. They sucked all the joy of me receiving my new phone. It is evident that they do not have trained consultants on the phones and their supervisors are never readily available. I would like them to pull my numerous calls and get their CEO to listen to them . They have spoilt my weekend.