Voice Mailbox inactive

According to the Vodacom website my mailbox is setup however when I dial 121 I am promoted to set it up. Why is this when its active on the site and has been setup a long time ago?<br> <br> Secondly when I try to set it up, (dial 121 and option 1) then the call just gets cut<br> <br> I tried using the chat tool for assistance and the agent (shaadi) disconnected the chat<br> <br> Why was my voice mailbox interfered with?