When one *****s up we all ***** up

So my problem happened a couple of months back where a sales advisor called me to say that they can increase my plan from R250 per month to R350 per month and my bill will stay the same.I asked her 3 times if my bill will stay the same and she said yes,month end came by and my bill was at R515.50 instead of R415.50 which it has always been.only to find out that she didnt remove the recurring data so I called to request that they remove the recurring data and that I will purchase my own data because I was told by one of the agents that if I down grade they will charge me an extra R1000.00 I said lets leave it at R350.00 only to find out a month later that they have down graded it even though I said they should leave it.called on the 1st of September to speak to a manager who said they will listen to the call and I have still not received feedback.my bill is now charged with an extra R1000.00 all because the advisors are so quick to either make a sale or go to lunch or just get the next call with a less complex query.I can not wait till my contract ends I am so over Vodacom they have *****ed me over far to much.