False advertising on Monster Energy drinks

False advertising. On Monster energy drinks.. Sasol Petrol Station Komatipoort is running a promo on Monster Energy drinks.. Two Drinks cost R34 on promo when you buy using your rewards card.. I took 2 drinks and Cashier Momo.. told me I must change the flavor to the original flavor... Where as the promo says "Any 2 Monster"..

She called her senior Gift. Who refused to help me, telling me Monster Lando Norris is not on promo I should buy the "black monster" because the one in picking isn't on promo.... I asked her to go check the sticker on the fridge, she refused. I asked her to call her manager so they can help me, she told me her manager won't come for this..

If this is the kind of service your seniors display in front of your staff.. I'll happily never being my business in Sasol again..

I ended up paying R50.00 for items the cost R34.00 on Promo I'm very disgusting by such behavior in such a big brand