Breach of contract and privacy policy

My mother was called by a vodacom sales person who offered her a trend neo samsung. My mother already had a vodacom contract which was due for an upgrade in September 2015. The sales person offered her the upgrade which was obviously going to be a new handset but he offered the upgrade for a lesser amount than her current contract which she was happy about and in a separate telesales she was offered a tablet which she also took up however, come the end of the month a lager amount than expected was debited from her account. Following this up we discovered that the sales person who offered her an upgrade didn't upgrade, instead he added a new contract leaving my mother with a total of 3 contracts. We then contacted the sales person of the trend neo on his number to query this matter and he said he would sort out the misunderstanding. End of the month of October no debit orders went through and no contact was made by vodacom to query this. Fast foward to 2016 we went directly to a vodacre shop where they explained that her debit orders were cancelled, meaning the sales consultant did this without my mothers knowledge. we called vodacom 3 times last week and the line was hung up on us