Absurd Penalty Fee for downgrading.

Customer for years I have forgiven multiple errors that cost me money and precious time to resolve them and get my money back because of your mistakes Vodacom. But somewhere I have to draw a line as I believe you like dealing with mindless customers. I signed for a contract with a device for 24 months. A few months into it I decided to migrate the existing Flexi 200 Top Up to a Smart S+ Top Up. from 175 exc VAT to 339 with no objection. As it turns out down the line I am not using nothing from the SMS's and Data only the minutes as my circumstances have changed. So I decided to ask to revert my contract back to the original Flexi 200 only to be told I need pay a penalty Fee. Are you Serious ? When you get my money every month and I use half the contract do I ask for a refund ? Atrocious absurd I wish I could find more words to describe this. I will move all my contracts away from Vodacom already I have requested the cancellations. I would rather pay more and cancel my contracts than give you another penny of my hard earned money to downgrade my contract not more than what our original agreement was. I didn't ask to pay less for what I signed for. But when I asked to pay more you where more than happy to agree. But now that I wan't to go back me as a customer I have to be punished because I wan't to go back to my original contract. Shame on you. You would rather loose me as a customer so I can keep paying high than converting me to my original contract and keeping as customer. What can I say?