Hi vahankart,
Are you paying the tutor directly or did you purchase a tutoring package from this GMAT Company? I ask because that tutor appears to be behaving in an unprofessional manner - first, by insinuating that he/she can tell you the exact questions that you will see on Test Day (which would be an illegal service to sell you) and second, by trying to charge you more (since tutoring packages generally have a fixed price based on the number of hours purchased, and a reputable Company would not allow the tutor to negotiate in this way).
It you are happy with the tutoring service, then all of this might be moot, but you might consider reaching out to discuss these issues with the Company that you hired this tutor through.
GMAT assassins aren't born, they're made,
Rich