My calculator didn't work during my math HL exam for paper 2

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I had an incident during my Math HL paper 2 exam. Even though my calculator was double-checked the morning before my exams, it stopped working. I asked for help from one of the invigilator, he, however, said to me that he cannot do anything for me. I was not provided with another calculator, and so I had no aids to do paper 2.