SARS not Contactable vis phone (booking, call, call back, not working!)

SARS is not making it easy to comply with them! One books a call appointment with them and they do not call you nor reschedule!? one of many reference numbers: available

So if they do not answer how do you respond and resolve your issues with them?

Calling them is also futile while you hold for hours then when you the first caller in the line you get cut off? Really?

But they are not shy with issuing penalties for errors on their part then not resolving them?