Contract upgrade ***

upgrade contract about 2 months ago with cell c call centre over phone person told me same contract,same payment a month and still get same benefits 100 min,100 mb,100 sms.on 29 april 2016 upgrade started but its a difrent contract pay r99 a month but only get 50 min 50sms and 50mb.old contract subsription was also r100 a month so why will i pay the same and get less benefits,so i will not upgrade if person who help me told me the correct info of upgrade contract,and not telling me that its the same benefits.please cancel upgrade and put me back on old contract or cancel the contract.tell your sales personal to give right info to customers when selling contracts over phone. contract.cell no ***