Contact details of SA High Commission in Zambia (Johannesburg)

Hi there!! I have been trying very unsuccessfully to get hold of the SA High Commission in Lusaka, Zambia - none of the listed numbers go through...would anyone by chance have an alternative/mobile number please?

And yes, when I get a chance I will physically go there, hoping there aren't hundreds of people in line, I just want to ask them 1 teeny question! :)

Much appreciated!