Octotel running a fibre monopoly

So who gave Octotel the right to change packages and offerings without consent and then force them off on the consumer? People be aware if you sign up with Octotel through any network be pre;pared to have your package changed without your consent based on the " we dont offer that packages anymore" yet when you sign up as a new client they offer you the lowest package to get you on board and then gradually increase your line speed and contract amount and in doing so you pay more and more for something you didnt agree to or was in the fine print but as we always do we dont read the fine print. This was my experience when i signed on with Vodacom using the octotel infrastructure starting from R499 in 2022 to R829 inclusive of vat in 2024 giving you a increase of 60% in less than 2 years is this right ? Do they have the right to change prices and packages if the infrastructure remains the same ?