Contract advert not getting what is indicated

Hi, each time I upgrade with Vodacom there is issues. Last time I was supposed to get a headset and powerbank and did not get. I escalated it and nothing happened. The previous time I signed a contract for 1 amount and got charged a different amount. Now they have a promotion with Fortnite vbucks and everybody think its vodabucks or do not know how I get it. They refer me to their Voda app chat line and the chat line refer me back to the store? The promo indicates you get 2500 vbucks "for fortnite the game". I am getting tired of these promotions where it indicates you get something and you get nothing but excuses why you dont get it. The website indicates to go to Samsung app, Samsung tells me vodacom needs to provide me with the voucher. The Vodacom site indicates I need to put my IMEY into their tab, their site informs me my IMEY does not exist?