Hi akshaybapat23,
I'm sorry to hear that your Official GMAT didn't go better for you. Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What materials have you used?
3) How have you scored on each of your practice CATs (including the Quant and Verbal Scaled Scores)?
Goals:
4) What is your goal score?
5) Do you know the application deadlines for the Schools that you're interested in?
GMAT assassins aren't born, they're made,
Rich