False advertising

"Preorder the note 8 and get it between 15 and 22nd September. You will also qualify for a free Level u Flex headset". Paraphrasing but essential you couldn't keep either promise. Only received the item on the 26th/27th. I try a redeem my free gift and it is off the rewards app. I phone Vodacom after service and they are unable to assist because their system is down. Currently you are leaving me with no option but to go to the National Consumer Commission for false advertising and inability to provide what was promised