Vodacom - Pillar to Post, close and issue new reference endlessly

I am currently not being assisted by Vodacom up to date. I asked for 40GB data which cost R199 and the implementation was done with a different billing since 27 March 2019 as R225.99 and when i enquire about it i get excuses which they says it is VAT. Later on i ask the same service on a different number and they implement it as R199. when i enquire about it for them to explain the differences its no longer a VAT issue, no one is able to assist and their current excuse is called a discount that i was given at the beginning of a contract. when i tell them that i saw a service that costed R199 for 40GB data and we never discussed discounts. Their excuse is to say how did i get this contract, was it instore or online. I told them it was online, of which it shows that no investigation was done. they cancelled the old reference (ref number ***) so they can start the new one they transfer it to sales department (ref number is: ***). Can you mediate because on the second contract the billing is R199 and there is no issue, vodacom find it impossible or refuse to make this two contracts identically since Data is the same but the billing is different. I have to wait more than an hour to explain my self from each and every Department to enquire about the status, while they say there are recordings that are kept, when it suet them. But they fail to use these recordings to resolve my case.