Unhappy customer

I am very disappointed in the service I received from Telkom I took out a contract in February it was 120 gig day and 120 gig night data for R199 per month I took out this contract as it was convenient for my son I clearly asked the consultant if at any stage of my contact the fees will increase she assured me that I will be paying R199 a month throughout my contract come to find out my son is only receiving 80 gig data a month when I phoned them from the 15th querying this issue they have been giving me the run around giving me Numbers to call to log a case when I asked them to send me the voice recording they said they can't do that I said it's fine I just want someone to listen to the recording as I took out the contract via phone so I don't have a hard copy of the contract since the 15th I can't get any consultant to log a case all I want is the data I was offered at the price they gave me I am not upgrading my contract my number is ***