Hi Smit,
First of all, do not get disappointed with your score. All test centers are equal and the software is well tested and certified, so there is no problem with that. Sometimes, we do some unrealized mistakes - for example I often find out correct answers, but mark incorrect ones.
What materials did you use ?
Which mocks you took and what was the score-split ?
Did you take the mocks with AWA and IR ?
GMAT has changed a lot, bold face questions are not limited to high scores. I encountered them, even if I scored V23.
Re-formulate your strategy and try one more time.