Mislead by Vodacom fibre

I was sold an uncapped 20mbs fibre deal by a consultant who came to my door while fibre infrastructure was being installed in my area by Vumatel. I was made to believe that the service was unshaped and would not be throttled after reaching a certain amount as I asked him all these questions before signing up. Was offered an interim solution free router While services were being installed which I recieved a week before my service was activated but it never worked after logging multiple complaints, my fibre service was connected and after the first 28 days I was capped to a 2mbs line even tho the consultant promises me it wouldn't be capped I then complained and found out that they have a 500gb fair usage policy that can't be upgraded after dealing with this and accepting it the next month the cap started on the 21st of the month and has been happening earlier and earlier every month now however we are still watching the same things and usage is exactly the same as when we started the contract, we are now currently being capped by the 12th of the month to a 2mbs line even tho we are paying for a 20mbs line. After reviewing the original quotation I accepted from Vodacom it does not make any mention of the fair usage policy and if I want to cancel I have to pay the contract out for the first year. Vodacom you ****ing *******!!!!!!!