Mumbai Traffic Police — Wrong charges for Violating speed

As per rule the speed for LMV is 100 kmph on expressways but mine speed was 93kmph then can i know the reason why I have been charged and it's showing 90 km speed should be maintained which is wrong the express boards denote 100 kmph for Lmv vehicles and that too 2000 rs. Atleast be genuine to your work if I have been crossed 100 kmph speed then I understand but I was on 93 kmph and you are charging 2000 rs as per my knowledge its 1000 rs and that too it's not applicable for me.

Secondly I have crossed just 102 kmph and your speed limit is 100kmph for Lmv I accept that mistake but why am I charged 2000 rs as per my knowledge it's 1000 rs.

Please look into these mistake what is happened exactly and let me know. I have attached the picture please refer it and send me a mail or call accordingly. Till that time I won't pay it.