Change of plan after 4months

Hi Cell C. I received a sms that my current contract is expiring but it is only 4 months old. After talking to a consultant I am informed that my current contract choice of Media Play 4GB is not available any more and I have been automatically moved to another more expensive option. I don't care if the current plan is not available to new customers anymore but I should be kept on this chosen plan until end of contract.