Mtn 3G Uncapped Lite Throttling to 64kbps problem

I have been on an Mtn Uncapped Lite Contract for years.Since the 5th of October 2017,I started to have really slow speed.Thought its coverage issues.Contacted Mtn. Then I read on the Mybroadband.co.za forums that people that have the same Uncapped Lite Contract are experiencing connection problems where they are being throttled to 64kbps. I got a Mtn prepaid Sim and some data to test.Sure thing no problems.I email Mtn Customer Support.They never admit.I called Mtn on 173.O they know.they are experiencing technical problems on that contract.After I have been without internet for 5days they couldn't tell me that firstly? Why after 8days of emails, phone calls could they then admit they have a technical problem.They did not warn me that I will be throttled to 64kbps? How can Mtn just decide to throttle everyone to 64kbps Dial up modem speed while their own fair use policy state after 3GB of useage u will be throtted to 256kbps.Now suddenly 64kbps.how is that not a breach of contract and its own terms and conditions? I'm considering lodging a complaint with ICASA and the Competition Commission.Its a clear violation.Surely Mtn is bullying consumers to another contract.