MetroFibre : No SMS OptOut

I cancelled my MetroFibre contract 2 years ago when I moved from JHB to CPT. And still 2 years later I am still getting SMS communications for network related issues in JHB. Even after sending numuorous requests, optout stop sms's, emails and endless phone calls to get it disabled, and still it continues. The only time I get someone to contact me back, is if I send a request as a potential customer. All I want is to have my number remove from their SMS systems!