Cancelled numbers Continue to be billed

This is now the second time in almost as many years that I am experiencing the same **** with you people. I called in last year to cancel two promotional numbers that were added onto my account as part of a promotional deal. The duration of the contract then ended and I proceeded to cancel the two numbers in question. It was brought to my attention that the two additional numbers, which should have been cancelled, are still being billed to my account because someone in the cancellations department failed to send me a confirmation email/sms. I then lodged a complaint and the closed my ticket with no explanation of the findings and then all my accounts were blocked. I WILL NOT pay for these additional lines that should have been cancelled and am now going to demand that I am reimbursed for the monies you owe me! Absolutely disgusting service to a previously loyal, long-serving client with multiple lines on account. Should this not be sorted out I will be taking further action!