Vodacom's disgusting service!

Disgusting service, no one has to take responsibility, there's no reference numbers that are provided and you have to repeat yourself over and over and over every time you call as you start to try and resolve your problem with each new person, they tell you there's no other way but to call you back then proceed to not call you back, and guess what there's nothing you can do about it but call back and start the process again. I have never been so frustrated with anything, I actually feel like crying or screaming, I've been struggling to get an upgrade cancelled for 3 months due to it not being delivered to me, furthermore I have now been billed for said device that I don't have and I can only imagine how long that will take to be fixed.