Spice Jet Airlines — charged for 1 kg extra weight due to laptop

I was travelling from hyderabad to varanasi on 30th september pnr oclc7d,
At the check-in counter i was charged rs 400 as my laptop was a little heavy, i do not understand this? Can you guys lend me some money so that i can buy a light weight one, and then would be fit to travel through your airlines without paying the fine.

Miss pamela at the counter also showed me one instruction list of hand baggage limit of 7 k. G, (My hand luggage was 8 kg) which i know already but i think a gram or kg or if it is because of water bottle or laptop, one should just let it go. Like we let go off you when you cancel the flights or delay it because of natural events.

I hope i would be heard and receive some response.
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