Vodacom BAD service

I have cancelled 1nof my numbers on the 4th of June. Their policy states that between the 1 and 5 of each month it will be cancelled at the end of that month, then you will pay for another month for the cancellatiin month. They still charged me in August. Keep on cuttimg me off when I phone or say they will transfer me to another person/department and then cut me off. Or the person I speak to says they will escalate the query via email and I must follow up after 5 working days and so we go on and on and on with no solution. I just want a refund which I am entitled to but nobody wants to help me. Very frustrated with Vodacom!! Still have 2 more numbers with them.