Incorrect billing and now suspended service !

I am writing once again about my dissatisfaction with Vodacom.<br> 1Have requested that should any amount above the normal charge of R199.51 go through on debit order they must notify me to enable me to make the funds available.<br> 2This was no done and my d/order was returned.The bank charged R90 & Vodacom charged R99 which is higher than bank rates<br> 3The following month the same thing happened again with no notification.<br> 4It is very difficult to talk to anyone at Vodacom with authority.You get a voice mess & I choose the option to call me back giving the phone no.No one phones me back<br> 5On Fri 26 Feb 16 got through to call centre,they put me through to acting manager for the day.She said it has to be paid & when I asked why had I not received a bill for +- 18 mth as had I received it I would have seen the extra amount.Could they not meet me halfway?She said it wouldn't happen.I then asked if I could pay over 2 mths from next mth.She said she cldn't decide & that I must speak with the call centre to make arrangement.<br> 6This is what happens. No one can decide.She said pay this month & ph call centre on 1st. <br> Why is it so difficult to spk with anyone without going from pillar to post