Terrible Service!!!

I was told by a representative that my contract was due for an upgrade, and if I do not take a phone my fees will drop to R200. So, I accepted. Turns out I am not yet due for an upgrade and now nee fees have increased with R200. I called Vodacom and was told They cannot help me I have to Call Mondo. So, I called Mondo on 15/05/2020 and Nobuhli told me that an investigation has to be launched to find out whether I was mis informed before they can cancel my contract, and I will be contacted within 5 working days. It is now 11 working days, nothing. Then I call this morning and after holding for a long time I was told by Phindile that their system is offline, and she will call me back. I have still not received a call back! This is the worst service I have ever received!