cancellation

on the 24th of June 2015 I cancelled my agreement on a cell line as it expired ***. I am still receiving Invoices for this line. End of July I phoned again, still it wasn't cancelled. I emailed a cancellation letter. This morning I phoned to find out what my balance is, as I stopped the debit order, the person on the other end of the line told me it cannot be cancelled in writing, I was told I have to phone the cancellation number ***. I told him I have done this since June and still it wasnt cancelled. He told me he will transfer me to somebody else, I hold for a few minutes and nothing happened. I want to know what I should do to cancel this agreement, as I have to pay an amount R507.00. to cancel the agreement now.<br> <br> Whats more I lost the sim card. but did not report it as I cancelled the agreement on the 24th of June.<br> <br>