Hi himansh1998,
Assuming that you took the entire Exam - and did so without any technical issues (for example, did the Test 'crash' or did you computer lose power during the Exam?) - and did not purposely cheat (and get caught on camera doing so) - then we have to assume that your Score will be 'certified' and will be valid for the next 5 years.
Is there any particular reason why you think that your Score will be 'cancelled'? And beyond that issue, are you happy with your results? How did you score (including the Quant and Verbal Scaled Scores)?
GMAT assassins aren't born, they're made,
Rich