Vodacom, What Are you Doing?

I have had a contract with Vodacom for many years. Every now and then, I receive a call requesting an update here or there. On the 1st December I requested the cancellation of all Router Contracts as I have installed a Fiber Optic Line. During the last conversation, I was busy and the gentleman calling me mumbled and told me all about the more reasonable prices on lines linked to my mobile number ***. I received an account and I can't believe how much more I now need to pay. It is totally ridiculous and I mentioned to him that I was busy but he confirmed that it was 'brilliant rates'. I so wish Mobile Companies will be a bit more considerate because I have now found it impossible to get hold of anyone to speak to and my request of the 1st December 2021 has gone unread and unanswered.