Terrible customer service - Telkom mobile

<p>I've been a fairly happy customer with telkom mobile for many years. All of a sudden, the speed of my LTE connection dropped from around 30Mb/s to between 0.05 and 0.2 Mb/s!! After various attempts to speak to one of the managers regarding this, I have been placed on hold every single time, for more than 10 minutes each time, without anyone answering the call. On other attempts, I have simply been told that I cannot speak to a manager, as they wont be able to do anything either! My contract is for 50GB of data a month, plus an addition 50GB of data after hours! Problem is at this spead I wont even be able to use up the 50GB of peak time data even if I download constantly!!!!! Since Telkom is in breach of contract here, I am sure they wont mind me cancelling my contract with them with IMMEDIATE effect!!!!!</p>