Cancellation not done

i have logged a ticket that our telephone line gets cancelled at the end of Aug 2015 and requested that the line should be suspended from the 14/08/2015 since we have moved out of the office we rented. When i phoned the billing department they said no ticket was logged (i have proof on email that I send it through). After holding for the cancellations department for more than 30min I was simply disconnected. <br> <br> I need the number to be cancelled at the end of the month and also to be suspended immediately as the new tenants can simply use the phone lines which is now still active.<br> <br> The same goes for one of our other lines which I still am trying to cancel and suspend.