Unable to contact call centre

We are moving house at the end of April. I have been trying to contact Telkom for over a week to confirm and cancel the service. I cannot find an email address where I email the cancellation notice anywhere online or on Telkom site. There is no option for cancellation of service on Telkom site - only an option to move the line. You phone the call centre, and get a message constantly warning you of high call volumes due to industrial action. I have been on hold trying to get hold of anyone at Telkom callcentre daily for over an hour each time.You cannot get hold of the local Richards bay Telkom shop the phone just rings.Why is it so difficult to get any service in our country? This is unacceptable. You get the feeling that it is not allowed to cancel your service as email address should be freely available on their site. Instead you have online query forms which do not even give you a reference number, so where is the proof for the client that they have been in touch? I am not happy with this.