I want to leave your service!

Ok so I want to leave webafrica because I am basically paying for internet that I'm not using. I have tried to call to cancel for the past 2 months but you guys always seem to be busy. What's funny about this is that you are so quick to take calls from sales departments but nothing for opt-out clients. I want to cancel my debit orders but there is no help. Should I continue paying for this??? You're wasting my time, my airtime and taking money from my bank account when I want out!!!!! What is this???? What is this???? What is this???? When are you going to call me like you promised? Ag!