Rejecting calls and not able to deliver

I placed an online order with Vodacom on the 18th April and should have received my order on Wednesday 24th April. I have not received my order as yet and when I call RAM they reject my calls. According to them they tried calling me but I did not answer - the number they called me on was not my number. Apparently Vodacom gave them the incorrect contact number for me. When I asked them how they will rectify the situation because I have been waiting a long time, they explained procedure to me. Not even trying to fix the situation. Today, 26th April my order has still not been dispatched and when I call my calls are rejected. I am highly irate at this point in time. In addition to rejecting my calls one of the agents answered my call eventually yesterday and laughed in my ear. This is highly unacceptable! Pathetic is an understatement when explaining the service I have received thus far. Even though the details they had for me were incorrect, I provided them with the correct details the afternoon of the 24th April - surely by now my order should have been dispatched. I needed the phone at least by yesterday if I knew this would be the service I would receive I could have saved myself all this headaches and gone to the shop myself.