Paying for Vodacom's Mistake and lack of Service

I received a Bill of R9000.00 to be deducted end of April for a contract and Cellphone I do not have. I have been logging queries with Vodacom since March and each and every time I am promised that it will be resolved within 7 days. All the reference numbers and calls are reflecting on the system, but no one has done anything.The debit order has now already been scheduled to go off the end of April, which means that I am going to be nine thousand rand out of pocket. And if the payment is not received, my phone will be blocked due to non payment. This is huge mistake made by Vodacom, for which I must now pay for. This is unacceptable and the worst service ever. If you ask to speak to a manager, you are cut off. My contact has come to an end, and I will most definitely be moving to another service provider.