Sad state of customer service

This is the second time posting about the same problem. My previous post got some attention, I was contacted and it was temporarily resolved... Where do I start? I received my latest cellphone bill today and it still has the data line contract on it. Which would have been fine if I had the device...

I hope you can view my previous post for more details but in a nutshell I have 2 lines, 1 cellphone contract and 1 data line (router et all). The data line was up for renewal, I wanted to cancel as I no longer had the router. The agent convinced me to renew and promised they'd send me a new device and SIM. This is where the chaos started and nobody from the call centre can assist or are willing to assist. I don't pride myself on bashing people but I have never come across a more unhelpfull bunch of people in my life. I've been promised callbacks and escalations but still nothing... so here I stand... a new bill and no device. I wanted to renew the contract but now I just want it off my bill. I dont want it anymore. The service has been terrible and I honestly feel like I'll never order another line through Vodacome again.