Trying to Cancel Land Line without success

<p>I have been trying to cancel my business land line for the past two months, I have called the call centre and email countless times. Provided all the neccessary documentation to cancel the line and two months later the line is still activated I am still being invoiced even though I don't require the service anymore. I am at a loss at what to do as I need to cancel this service, as a small business that is battling to survive in the current economic environment we stay have to pay for services we don't require. </p>