SIM ACTIVATION ON NEW CONTRACT FAIL EVERYTIME!!!

I recieved an upgraded phone with Cell C on the 22 September. Cell c wanted to switch my current insurance on my device to the new device. So they told me in order for it to activate. I need to put on my new phone and make a call. I tried that. Realised my New phone's sim is not activated. I tried calling customer care. They kept trying to put me through to the sim activation. Which failed every single time. Sometimes the call even got cut. So i decided I'll go into a Cell C shop to sort this out. They said they can't do it, i need to do it over the phone with them. I told them i struggled every time. They then tried to call them, and it turns out they only work mondays to fridays. And i went on a Saturday. So now I'm sitting here with a New phone without signal. And the new contract is starting 1 November. How does one get a sim activated when NO ONE helps??????why is there not the option to do it in a store????i am so frustrated because i need to do the swap from the old device to the new one. But i cannot because no one is assisting with the activation.