Vodacom call centre inefficiency

Two months ago I was billled for a subscription for Game Mine which I had not subscribed to. Your call centre consultant cancelled the subscription but I was still billed for the calls up to that point - understood. Last month the same subscription reappeared and I was billed for another month. This time the consultant cancelled and blocked the subscription and told me that the previous consultant had failed to block it. So I have to pay an extra R235 because the previous consultant didn't do her job properly by blocking as well as cancelling. And of course there won't be any refund from Vodacom for what was your fault!