Unresponsive, ill informed and no one ever gets back to you

I have been trying to get hold of the correct people to advise what I still owe on my account to Vodacom. My legal team has also tried numerous times over the past 2 months to get hold of the correct people. Sadly no one responds to mails, answers calls, and when I do get hold of someone, I get put back on hold for 20 mins at a time before the calls are cut. I am trying to be a responsible client and pay my outstanding bills OR find out if I have been paying for something already paid up. Does Vodacom not care ?!?! This is so frustrating!