Vodacom contract ****s

I took out a contract in April2021 where I was to get a cellphone with two sim cards,one with airtime and the other with data which is a 100% discount, all for R230 for 30mnths. In November I get an email that my second line was billed in error and that I should pay R66 but that I would not be charged for the previous mnths. I got confused as to which line they are referring to, then I called customer care and was told nothing appears on their system and that I should wait until the billing reflects, only then will they be able to check what the email was about. In December I was then billed R317 now inclusive of the second line billing and when I contacted customer care, I was sent pillar to post until I eventually found out that the second line is the data sim card which was initially free. I phoned multiple times to express my discontentment but to no avail, I even sent a complaint but was never attended to and customer care seemed to never know what is happening. So I decided to reverse the debit order and I quickly got a call from the collections dept whom I then explained my query to and they said the matter would be escalated only to be called many times without any resolution. So I paid via eft the R230 as per the initial contract and then on 2022-04-29, I get a call from another consultant saying that there's nothing they can do, that I have to pay for both lines and that if I cancel the contract I would still be liable to pay for the remainder of the term but would not get the airtime nor the data for the term remaining.

In a nutshell, vodacom can change the terms of the contract and there's nothing you can do about it, you are bound to whatever they decide whenever