Bad customer service!

I went to Telkom store in Irene Mall to cancel my fibre contract. The gentleman who assisted me did the necessary captures to cancel my contract and advised me that the cancelation has been logged, my service should be down within 10 minutes, nothing happened my fibre is still active. I went to the store again on Friday and Saturday the gentleman advised me that it has been canceled but there was no response so he escalated it. I'm here because for 3 days I've been trying to cancel my fibre connection before the new month starts and I'm billed again, which I don't think is fair because had the agents told me that the cancelation takes 5 days to be suspended I would have went to cancel earlier but they did not. So I refuse to pay for the new month as I've canceled well before the new month.