Unreliable Billing

Saturday 27/03/15 my data device is soft locked as i have exceeded my voluntary call limit of R150. i phone at 14H30 and have it increased to R200. i wait till 18H00 and phone again just to find the incorrect date was chosen by the consultant. At 20H00 i phoned again and was assured it will be unlocked within 6 hours. Th line was only unlocked 08H30 the next morning. at 08H35 i loaded 500 MB data. At 12H58 i get an sms stating i have exceeded 90% of my call limit when i purchased another 500MB then at 15H57 i received an sms saying that the line had been locked again. I phone and find out my voluntary call limit is on R 261.00 and the R 61.00 is due to the 5 min my phone was without data in the morning. The consultant assured me that the limit is increased to R300 and i have 1GB data available to use. this morning i get another sms to say phone has been locked and when i contact the centre my voluntary limit is on R433.00 when i have not made any calls...i requested the Team Leader to call me back and she has not. I will not be billed for data used outside of bundle as i was guaranteed by vodacom that i have 1 GB available and it will not be locked for the remainder of the month.