Unhappy Vodacom client

I have recently got Vodacom fibre at home to replace my 5G vodacom which is great but the person who sold me on the Fibre told me that I would be able to cancel my previous contract as this was essentially an upgrade, and now I cant cancel the previous contract until it expires next year in March which is really bull**** as I wouldn't have gone for the Fibre knowing that I would have to pay for two accounts. This is really ****ty service and unfair.