Call centre

I am having endless trouble getting though to the call centre using a Vodacom cellphone. I am dialing 083135, but am immediately transferred to "Team Unisa" as a Unisa student, which I am not. Sending E-mails to Customer service also doesn't help - no reply. Using my wife's MTN phone, I get through, but gets transferred about 4 times to get to the correct department - then I held on for 50 minutes listening to pathetic music - then the call drops.