No response on Billing enquiries

I have called the call centre to find out why my bill for February was so high. The call centre agent and I argued back and forth bout data and cessions, mobile data, etc, until I was transferred to a manager who took 20 minutes to answer this call. After continuing the argument and specifically referring to my request for limits being put onto this account, asked how my bill could exceed this limit. I also quoted another telephonic enquiry where I was advised that my bill for Jan was R =-1300, this was on the 01/02/16 but was debited for R 2 200.00 odd on the 08/02/16. I have had my mobile data switch off as I have a network at home and I work from home for at least 95% of Jan 16. I also referred to sms's that I received from Vodacom on the 31 Jan advising that I have been soft locked, The manager promised to call me back in 2 hours on the 01/02/16. I'm still waiting for his call. 2) I took my complaint to Vodaworld, Midrand. Spent 30 mins queueing and re-explained my situation to a manager there who found 2nd bill for Jan but couldn't explain what for. As it was now 1.5 hours later, she said she will investigate and come back to me. This was 09/02/16. I'm still waiting.