Not TCF friendly

I have a Cell C Fibre contract which I recently signed in about October 2018. The contract is for a 20/20 line, VumaTel is the provider in our area. Since last week I have been experiencing speed problems of 10/0.9 versus the 20/20 which I am paying R907 every month. The problem initially was caused by load shedding which could be understood , however we have not had load-shedding in about 2 weeks however I was still experiencing this poor speed with no internet access at times. I called the Cell C Fibre support call centre on Friday evening at around 7pm and waited for about 20 minutes before the call was answered and then probably spent another 20 minutes trying to sort out the problem with the Agent which ended up with the response that I need to do 3 speed including a "ping" test and send them the emails with screenshots and that they would take 48 hours to get back to me. I tried to be the patient customer and give them time to handle my query , however only to call on Monday evening only to find out that the person i spoke to on Friday evening did not tell me that they do not work over weekends and that the actual 48 hours only started on Monday! I am very furious about this. However, that was due to the speed issue which needed to be sorted out and I was willing to give you guys some more time to sort that out. However I was now also calling about very frequent “no internet access” with my Wi-Fi???? How is this happening CellC? I pay you guys R907 per month for a 20/20 line and so that I would be able to live stream things while other devices are connected or even work from home when required with being confident that I have a 20/20 line, however now I’m stuck with slow speeds as well as “no internet access”. I can’t tell you guys at the end of the month, I only had half the line speed so now I am only going to pay you half the premium??? No, I need to still pay you the FULL R907 every month end, and I have been doing so since I took out the contract with you. I have now given you more than 48 hours to sort out my problem , with no reply or update from anyone at Cell C to tell what the progress is and also with no internet most of the day!!!! I need this to be dealt with very urgently, otherwise I would like to cancel this contract that I have with you guys due to breach of contract from you as my ISP.