Vodacom's highly *********** service

I have been battling for 24 days to get an incorrectly upgraded contract sorted out. I thought I had managed to get the matter escalated via their Facebook page but Fergie, their social media person, seems to be as inefficient as everyone else. I am at my wits end and do not even know what to do next. I have spoken to about 7 different people at Vodacom and every person has promised me results and yet here I am trying another avenue in order to get results.