Constantly harassed.

From day 1 I have been receiving spam email sand sms continually, despite me having asked them through every means of contact, as well as visiting them in person, to stop contacting me. My usage is far below my allocated data and yet I keep getting sms and emails to buy data bundles. Their systems are inferior for tracking customer requests, they don't respond to emails, and they just don't care about their customers. My internet is slow and unreliable some days, fast on others but generally it's just plain unpredictable. This I can live with, what I can't live with is the constant harassment. I value my privacy and have made so many requests to them, but they really couldn't be bothered to give a damn. I'm now resorting to publishing my frustrations on the internet and will most likely end up laying a charge at the police of harassment and cancelling my services with them. Worst ISP I have ever delt with (I have been in IT for 20 years and have delt with hundreds of ISPs). I am totally DISGUSTED with their behaviour and lack of interest.