incorrect billing

hi I am on top up R 200 and buy once off data bundles monthly and the amount gets deducted of my airtime but now I have been debited R 400 and the consultant told me that I have reoccurring data bundle and did not understand when I read out the balance Vodacom sent me while I was on the phone only saying that's what she could see on her system even her manager Thabiso was rude and arrogant they forget we are their clients and to be pleasant to us all.i wonder if he is qualified to speak to clients