*****ing my money!!!!

Dear Vodacom, I have been a loyal customer for more than 7 years. I have never missed a debit order and untill know I was very happy with the service. I switched to the red classic + contract after a consultant contacted me to upgrade me to this "better" package. Since I have been on this contract I have been debited much more than the amount the consultant gave me. According to my contract I get 1200 min talking time, 4GB data and unlimited sms's Today I got debited R4173.55 for a package that is suppose to be R1 399.00. I have contacted Vodacom 4 times in the last week to query the amount that the app said I owed. I used 4.03GB of data for the month of September and according to vodacom I used over R1 700 out of data bundle rates. Every consultant says that they will get back to me and I have not receive 1 phone call. According to Vodacom I am already R580 over my contact amount for this month, however I still have over 2GB of data and more than 700min of talking time. How does this make sense?????