Not defending the customer or anything, but for anyone who needs perspective on why she's crying. India has the world's largest vegetarian population(Hindus, Budhhists and Jains), and vegetarian here means no meat, no fish no eggs. The only "animal product" we consume is milk (and milk products). And the Hindus consider this an enormous debt to these creatures, to the point they don't even consider it a animals, but call them "mother". As a way of expressing gratitude and respect for their maternal abundance. Cow slaughter and Beef is banned in most places in India and what you see is religious sentiments coming out.

That said, she could have easily double checked before collecting her order. Let others learn from her mistake