TERRIBLE customer service for Telkom

I recently did an online order from Telkom for a new uncapped wifi installation package. Only to find out that they inserted the wrong address. Now that I am trying to correct THEIR mistake, I have to stay on the line for 20minutes. After 20minutes I get a voicemail. I hang up and call again 10213 option 1 & 3, to change the mistake THEY made, the consultant answer and then as soon as I tell her that we have just spoken, I get the voicemail thing again.

This is very bad customer service form Telkom, especially since I am a new client.

Regards, Garth