Line Not capped after Numerous requests

I requested that my data line be capped on 11 May 2015, after receiving an extreme account from Vodacom, without any data usage notification. Month after, account was acceptable but in July I received a huge account again, and again in August.<br> I have made numerous calls since May to no avail. Every time I am told to wait for an answer within 24 to 48 hours but this never happens. Yesterday I received my first data notification sms for excessive use of over R8000(insane). Tried to contact call centre. after being transferred from agent to team leader to supervisor, like every other time. This is not being resolved and charges keep escalating. There must be a glitch in Vodacom's system as I have uncapped adsl in my home office and never use this data line unless in an extreme emergency such as loadshedding which rarely happens in Durban North KZN.'<br> I really hope this matter can be resolved because after so many calls and going round and round I am at a loss of what to do next.