Bad service

It is so disappointing that i have an issue with m account then speak to someone who doesnt know what they are doing.

I took a contract of R499 which is inclusive of 1GB of data, nothing extra, no my bill is R999 coz apparently R500 for extra data was added on my contract as per Zinhle Ntentha whom I spoke to which i did not request for. She was so quick to tell me that im liable for it and there is nothing she can do about it. Isnt it that if the customer did not request for something an investigation is done to find out how did the error come about? Then after the findings a decision can then be done? Why should we be the ones to teach your people how to do their jobs? They then put you on hold for the longest time and come back to you to be quick to get rid of you from the call