Very disappointed customer

Worst experience, I ordered products via their online portal since the beginning of October, no response. Have sent several emails to do a follow with no reply from the person or persons in charge of my account, I drove to their company at 1 Friesland drive Modderfontein so that perhaps I could interact with a human being was not allowed in. Phones are never answered, their online system does not work. Do they even exist? I wonder how one can get hold of them