Incorrect Billing

I am a new customer at cell C activated my account on the 29/12/2015 and on the 15/01/2016 I was given a bill amounting to R1117 as pro rata for the 3 days and the month of January. Initially when I subscribed I took out a package were I pay R499 a month which includes 5GB of daytime data and 4GB of night time data, surprisingly I was billed twice the amount. I then called Cell C to enquire why I was billed such an exorbitant amount I was informed that I was on a open line, I advised the consultant that It was not what I signed up for I agreed to the prepaid option, she then logged a call for me to listen to the call *** this was on the 13/01/16. On the 20/01/16 I got a call informing me that indeed the consultant that assisted me never informed me of such a contract so instead of me paying R1117 I need to pay R514.39 and the balance of R602 will be reversed(a confirmation sms was sent) and that my contact will be moved to the right contract. On the 08/02/2016 I got a sms again saying that my account is in arrears by R567, I called in again on the 27/01/2016 and was given a *** and still have not being assisted. Till to date I am having the same issue.