Bad service from Vodacom

I recently requested to cancel my contract of 18 years and convert it to a top up. I have been posted from pillar to post by Vodacom for something which I believe is a pretty simple request. Firstly after initially making my request, I was convinced to take a 30GB anytime a month contract at a reduced rate. A month when this came into effect I was only credited 10GB only to be informed this was a once off special. I then requested that since Vodacom had not met their end of the bargain they cancel my contract to which I was informed it first had to revert to the old contract and then be cancelled.

Last Wednesday or Thursday I phoned to cancel, and a very nice lady assisted and informed me that I had to phone back today (Saturday 31 Aug 2024) to get the contract cancelled. She even advised that she had left notes on my profile so that whoever was to assist would know that this request was already in motion.

Today (Aug31 2024) I phone and am now informed that I have to give a calendar month's notice for this to be effected.

I informed to Agent who was assisting to look at the notes and action accordingly however this seemed to not be possible for her.

Am I expected to continue with something I do not want and who will be paying. I have requested for the last 4 recordings I have had with Vodacom and I am informed that this is a process and has to be escalated before I get them.