Sorry will not pay my bill for hidden charges

<p>On the 21st of May 2016. I called Telkom to TEMPORARILY increase my spend limit by adding R200 only for the month of May. My monthly fees are normally R399. On the 7th of June I paid in R610 which was for the month of May. I was never informed that I would have this R200 increase for the rest of the months since I specifically asked for this option only for the month of May. Now my invoice for end of June 2016 is R799,which makes no sense to me. Yesterday I called Telkom to query this matter, the consultant told me that they do this to all their customers and she apologises but there’s nothing they can do now since I’ve used the airtime. Of cause I used the airtime I did not know I was being charged extra for it ,my line is not an open line. The consultants keep saying sorry but that won't pay my bill</p> <p> </p>