False adverti*****t

I am in a contract with Telkom and last month one of their agents informed me they no longer offer 800MB deals so by default my number will be upgraded to 1.5GB free of charge. To my surprise, I was billed an extra amount on my contract. I went to the shop where I was told they won't be able to assist and that I should call the person who upgraded my contract. I call their customer care line and a call was logged and closed stating that they won't assist. Please be aware of Telkom lying to their customers for sales.