Delivery Mistake made and no one will resolve

I tried upgrading my phone via the website but got an error message on the site, and then phoned the number on the website. Through this number, I upgraded my phone. They informed me that I needed a new simcard and that this would be delivered with the phone. When delivery occurred the wrong sim card was delivered (macro instead of nano). I phoned customer care, who referred me to upgrades. Upgrades referred me to online. Online referred me to Sales. Sales referred me to after sales. After sales referred me back to online. The worst part it that this EXACT situation occurred earlier this year when we upgraded my husband's cellphone. I eventually gave up and went to purchase him the correct sim - this time around I didn't want to go out and purchase another SIM but seems I will have to. Also, Mpho from after-sales put me on hold, and when someone answered again it was not Mpho but Amanda, a completely different agent unaware of my issue. They need to train people to deliver the correct simcards (macro or nano depending on the phone) and the call centers need to clarify who resolves these issues, because right now no one takes ownership. You've wasted my time. Improve your service.