I am everyday trading with two other brokers they are charging me just .02 % stamp duty I can post the contract note. As far as I know stamp duty should be same with all the broker, isn't it? that list is clearly fake from where did you get that list ?
Generally Stamp Duty is levied by respective states as per the Indian Stamp Act 1889,where by each state has modified the schedule to that Act. Certain States also have their own standalone stamp laws. You can even google to find the rates.