Un authorised spend limit

i had cancelled my contract with telkom until their retention employee called me and offered me a package where i will pay R99 per month and will continue to receive same benefits from my previous contract . i clearly told them i don't want to pay a penny extra and he assured me that i will not even pay a penny extra<br> he never mentioned a spend limit to me and now iim receiving bills for more the agreed R99 and when i queried this i was told my spend limit is R500 which was never mentioned to me or explained to me. <br> i have called the callcentre to have this issue sorted and have the amount reversed without success<br> Telkom case number:***6<br> nomvuselelo mcobothi is the agent that helped me on both cases and when i clearly told her i don't want the spend limit of R500 she never reduced or cancelled it<br> 11:43am 12/7/15 and 9:38am 12/30/15 are the times and dates i called the call center<br> i need all the monies refunded as they were deducted without my consent and its ******* as telkom employee never disclosed to me the spend limit of R500 when he was doing retention