Absurd price hiking

I did not know that taking up an offer with Vodacom to upgrade, would end up as a nightmare. I've had good and bad experiences with Vodacom, I however kept giving the brand the benefit of the doubt. Let's just say, I was loyal to the brand. Data line was R139 per month for 24 months, I was never told that it's discounted from R500+, and that should the contract come to an end, it will be billed at R500 + should I not cancel. I called in, *** was seemingly handled incorrectly or sent to the wrong department. But she gave me advice and told me to cancel the contract. I was transferred to Cancelation and I spoke to Lesego. It has come to my attention that there will be no credit done, let alone any assistance. I have requested for a recording and unfortunately, I can't be given a reference because it is going to the manager on email request. Can someone please help me and get me the relevant information so that I can take the necessary steps