Shocking service by Vodacom

I am incredibly frustrated with the lack of service offered by Vodacom. I sent through a cancellation request with all the docs required including proof of payment almost a week ago. I phoned in on Monday 22nd to check how far it was and was advised that my payment and docs had been accepted but was pending and that they could not say how long it would take. I phoned in today (Wednesday 24th February) to find out what was going on. The call centre operator advised that there was no record of my cancellation. When I asked to speak to a supervisor, I was then told that the systems have changed and that my cancellation couldn't be picked up initially but confirmed they had it. Maria (supervisor) told me she would call at 11am with feedback. .I attempted to call at 13:30 as I had not heard back from Maria. I asked to speak to her and again waited 15 mins before I hung up. I called again many times from 15:00 and spent no less than 1 hour and 15 minutes to no avail. I have since spoken to 5 individuals and all have been as useless as the next. No one seems to want to help because it is a cancellation. Vodacom forgets that I have been a customer for more than a generation.