Vodacom Just For You

I saw a data deal for 5 gig a day for 30 days (for 999) on the vodacom app. So I tried to purchase it via my bank, but it told me the offer is only available via airtime. So then I bought the airtime, but suddenly the offer is no longer available. Instead only these expensive deals, like 5 gb for R349. Called the customer service and they tell me that theres nothing they can do and they dont do refunds and they also keep insisting I should just buy whats available (these terrible deals) and 'maybe the offers will show up again sometime'. I honestly just feel like I was ******* into buying airtime, because now I just wasted R1000. Even after the call, i wasnt prompted to rate the customer sevice like usually.