adsl cancelation

I recently went over to mweb because telkom is to expensive for me. I had an 2mb/s uncaped internet with telkom. Now i want to cancel the internet and keep the line so that mweb can work. I phoned the call centre and the lady put me through to the retention dept where Kaylen assisted me. So I gave him my details to cancel the internet and keep the line. He told me the system is offline and as soon as it is up again he would cancel and sort it out for me. Nothing was done about it and i received a bill of R1400. I am furious about the poor service I'm receiving from Telkom. Can someone please assist me with this matter and open my line again.