False info to have one take an upgrade

Got a phone call. They will upgrade my contract, plus I will receive 2 new phones, and I do not have to pay for any devices. Got the quotation week after I received the phones. Surprise ..... I have to pay for the 1 device and the other device I have to pay for the sim card that was sent as well. Phoned Vodacom, they put me through to the company who contacted me. Apparently I do not pay for the device, the amount just need to be on account to make up the total amount to be paid. Makes no sense. I am still being billed for it. The other phone I now have to wait until they listen to the recording when they phoned me with the upgrade. False information given just to have me take a contract