Bad service

I called Vodacom Cancellations on Monday 05/03/2018 to cancel my contract. I spoke to Oscar who advised that my contact was cancelled. He did not advise me of any fee or told me that I was unable to cancel. I left the call thinking that my line was cancelled and will be moved over to prepaid. I went that same evening to take out a new contract with a different service provider and tried to port my number. This was declined. I called Vodacom again on Tuesday 6/03/2018 and spoke to Lesego who was very short with me and advised that I need to call back the next day. I called again on 07/0/2018 and spoke to Colin who advised that he will cancel my contract with no penalty. he advised that his team leader would do the cancellation. I called back again today 08/03/2018 and spoke to Nyito who told me again that my contract cannot be cancelled. He became very abrupt with me and raised his voice at me when I asked if someone was going to call me back. I work in customer service and deal with clients everyday and the level of service I received from Lesego on 06/03/2018 and today from Nyito I feel was unacceptable. I have a valid query which I have been trying for 4 days to resolve. Each time I call, I get a difference answer. Absolutely poor service. I hope that on the back of this review someone from Vodacom who is able to resolve my query gives me better quality service and actually resolves this. I am absolutely appalled by the service I have received after being a loyal Vodacom customer for over 15 years.