Line cancellation

<p>I have tried to cancel my line from December 31st 2016. My number is ********** . The line was never cancelled on the specified date. After sending in the forms, phoning the call center multiple times over the past 4 months, I was assured on the 28/04/2017 that the line has been cancelled. The reference number is NGN/ ********** 42A. The line is still active, I'm still being billed for a service I haven't used since December 2016!!!! I have tried my best to resolve this issue in a civil manner but I never get anywhere. Please make a point of sorting this issue out since I've sent in the form last year already!!!</p>