BAD CLIENT EXPERIENCE

I am currently busy with a cancellation due to being mislead with information provided to me when I was called with a "better offer" but I ended up paying more. Its now been more than a year that I have this contract and just not getting any joy with the cancellation. Its almost like they delaying it so that they can get more monthly payments out of me. I was told that in order for them to cancel my contract I need to return the devices which I did. I received a SMS to confirm the devices was returned but no one has called me ever since. Its now been 4 weeks where I am waiting on a manager to call me to do the cancellation because the agents don't have the authority to do the cancellation. Each time I call in I get told that they will escalate it and a manager will call me within 24 or 48 hours. I have had enough and will now proceed with legal action. I have been a client of Vodacom for over 20 years and this is the treatment you get when you want to cancel due to bad client service and false information