I wouldn't worry. The question is half operations half marketing. Globalisation itself is pretty interchangeable and you could have approached it from an operations perspective - then linked to the marketing aspects of price and quality.
I hope they have leniency in the marking centre towards operations-based essays to some extent.
I feel the exact same way!
I wrote my whole essay about operations, except one sentence mentioning price points (marketing).
I also walked out of the exam feeling happy but when i checked the HSC facebook discussion group everyone was saying: "lol the kids who wrote about operations for the marketing essay... RIP 0/20" 
Honestly i'm quite upset and angry since business was my strong subject... but no point fixating on this mistake, still have 2 more exams i can make up for it.
I wouldn't beat your self up over this, i feel that if you wrote a structured essay with strong links to a case study, then you'll still do ok ( really hoping that this will happen with me).
Hope this cheers you up
, i'm also secretly glad i'm not the only one! ( and i bet hundreds of others also wrote about operations)
Legit thank you for this HAHAH. Lowkey it's reassuring that so many people wrote about operations. Hopefully your next two exams go all g to make up for it (which is if they even mark harshly anyways, hopefully it'll be alright).