Tata Consultancy Services — Shiv jyoti exam centre kota staff didn't not change my broke down keyboard

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Shiv jyoti international school,ranpur,Kota, Theni, Tamil Nadu

I was appearing for ssc cgl mains along with typing test
I have noticed that something is wrong with a a key in my keyboard i informed the invigilator but she asked me to tell after mock
I gave the mock and told them but they didn't tell me anything
I was waiting for them to change the keyboard but the relsted invigilator gone out of the room and I was confused. I don't understand whether they will change the keyboard or not not .The test begins suddenly and I couldn't do the required typing on time to a key
My hard work spoiled due casualty of invigilators