Tata Docomo — cheated with advetisement give sim card of 3G and give service of 2G , Also have less signal strenth on network and bad customer care service

dear sir, i have purchase tata docomo sim card, and active plan for 3G before 3 days, but i found that company make big frod with me, it has speed less then 2G service, i request you to pls take strict and nacessary action on this compnay to making fool the people i also request to consumer dont be tatadocomo, try idea, or other service provide tejas tank [protected]