get it - refuse to stop billing me - a year after cancelling

had the add on service on my account for the past 4 years, have not used the service once - ever.....cant even remember taking the service. about a year plus ago i became aware of the R79 per month being billed and requested it be removed from my account. since then been in to a cell c store in cape gate three times and every time i am promised it will be removed but nothing happens. it is beyond frustrating. i want the service cancelled and my funds refunded. i have the reference numbers and the promise someone will attend to the problem within 48 hours. no one calls.