Cancellation of contract

I did a premature cancellation on my account (I had three numbers) in early December. I received the quotes to, which I paid. I emailed the proof of payment along with the signed quotes. I was debited from my account in Jan, Feb and now again in March. I have made numerous phone calls to Vodacom only to get transferred from one person to the next. I have reference numbers for complaints and still nothing. This morning I tried again and have spoken to 9 different people before being disconnected. Even when I ask for a supervisor I just get transferred to a different department. I am beyond frustrated that no one will help me.