Called in to cancel and was mislead..

I called in at the end of March to schedule my land line to be cancelled on the 1st of May, agent told me I cannot cancel my line because I have an Adsl line with another ISP. So I asked her what must I do as I need my whole line cancelled on the 1st of MAy, she told me that Telkom makes exceptions for instances like this and that I need to call in the 1st of May so that they will cancel my line immediately, I asked for a reference number she said there isn't and that she will put a log on the account.<br> So I called Telkom the 4th of May to process the cancellation, they said I must wait for 30 days, I explained to her that I called in before and was told that they will cancel my line immediately because of my adsl not being with them, I requested to speak to the manager, few min later I spoke to someone call Xhosa when her heard I want to cancel he was making like he couldn't hear me making noises like the line is breaking, but I could hear everything in the background how he and the consultant giggle, he told me that the consultant I spoke to had supersonic hearing that why she could hear me. at the end of the day my line is stil active and I need to CAncel with immediate Effect