FEEDBACK ON DATA BILL AND PURCHASE REFUND

On the 2 or 3 of April 2015, i mad ethe incorrect selection on my phone under self help for the data bundle purchase i called in and the consultant advised which option i should have picked and explained what the month-mont option was for and asked about if i could or should rebuy from my airtime the correct option she told me on she said yes! i purchased the 1G from my airtime and the month to month data bunlde would be reversed and as it was towards easter weekend it will be done the following week and then on the 04/04/15 i get a sms from vodacom stating that it has been de-activated and then i receive my statement that the bundle was added on there , i am now sitting with double purchase of data bundle which i onlly need 1G but being charged for an extra 1Gn and when i have called numerous times to the call centre i keep being told that they will liase with their team leaders and listen to the recording and get back to me up to date nothing ahs been done till today when i called in to ask what is happening but get the same story with no progress? i cannot be paying for an extra Gig when it is not being used? And still to have been told I can repurchase my 1G from my airtime