9 calls to cancel a number and still active

Canceling a number is turning out to be a *****.<br> <br> In January 2016, I called to cancel a contract and they told me I will be migrated to prepaid with in 28 days, I will pay my last installment end of Feb.<br> <br> In mid February 2016 I called again to confirm that the number will be migrated,this time they told me that the was nothing loaded on the system to have this line migrated or canceled, So they loaded another cancellation and said they will escalate the cancellation and that I can call the contact center the next day to confirm, that same day I canceled another contract. The next day I called and they said that the second contract has been canceled and that the first contract I canceled does not reflect any cancellations or migrations loaded on it.So they loaded it again.<br> <br> A week after that I called again to confirm that the number was canceled, same thing there is no cancellations or migrations on that number so they loaded it again. Another week later the same thing.<br> <br> I called last week same thing, I called today and guess what,same thing the number is still active.<br> <br> I don`t know what to do anymore.I stoped the debit order for that number maybe they will do something now.