Termination of Contract

Hello. My subscription is supposed to end 31 March 2015 and as early as January 2015, I have sent them the Cancellation form via [Email Removed] contacted their agents via chatrooms and still received no feedbacks yet until now. I am outside South Africa since last year, and tried several times calling their customer service hotline to no avail (even when I was still in South Africa it's very difficult to get through them). Now last March 2015 I received my bill with amount due R299 (from the usual R638) and thought this was because it will be my last bill. Then just this month, I received another bill (same amount R299). I don't even know what is the problem why can't they terminate the contract as dated.<br>