Impossible to Cancel Account!

I have been desperately trying to put in my 30days notice to cancel my account but with no success. The call centre is a absolute nightmare and after sitting on the phone for 3 30min sessions only to get dropped before talking to someone is unacceptable! All I'm trying to do is simply cancel my account with Telkom and that seems to be the most difficult thing to do! <br> <br> I am leaving my current premises on the 31st of march and therefor need all of my services to be terminated by then. My phone number is ***.<br> <br> I hope really hope there is some way to resolve this otherwise I have no idea how I'm going to solve this!