Bul**** by Vodacom: why am I not surprised

I want to port to a different provider. On 24 August 2017 I requested a quotation from Vodacom for immediate early termination of a Vodacom contract. I paid the quoted amount on 25 August, and sent the proof of payment to the provided e-mail address. I requested Vodacom to convert my number to a pay-as-you-go number. Since then I made more than 10 calls to their call centre, spending more than 2 hours on the phone trying to sort this out. Numerous promises and target dates was made during the various calls. 3 working days, 4 September, immediate termination etc. I had to resend the proof of payment. Done immediately. When I phoned then on 14 September, I was informed that there is no order for cancellation on my account. Vodacom is now bullying me, even after I paid the quoted amount. They received my money, I need my number!!!