Struggling to cancel Vodacom Line, want Money back

Actually the rating should not even be 1 Star. My husband has been trying to cancel a particular line of his, and he has been trying for months now, by contacting the cancellations department. The line is still active and deducting. Thus he is wanting his money back and this sorted out as I advised him to call in advance to make sure the line cancelled on the correct date. He has spoken to cancellations twice and to upgrades (x3) when they wanted to offer him another deal - he then explained to the lady he has been wanting to cancel. In so many words she told him it is not her problem to sort out then. He's had his personal number since 2001 (a Vodacom client for 20 years) and he is not happy with this kind of service at all. When you visit a store, they will just tell you to call the cancellations department. Mails sent are being ignored.