Karnataka have now remained unbeaten in their last 14 T20 games, the joint highest winning streak for an Indian T20 side along with KKR.
Vinay Kumar and Abhimanyu Mithun fired Karnataka to a thrilling four-wicket win over Chhattisgarh.
Karnataka put up an all-round display against Bengal in their second round-clash of the Syed Mushtaq Ali Trophy.
Kotak accused Karnataka players for making false appeals during the match.
Saurashtra star batsman Cheteshwar Pujara was at the receiving end of a hostile reception for not walking.
Unadkat and Jadeja took three wickets each to peg the home side back after Saurashtra made just nine runs from their overnight score of 236/7.
Abhimanyu Mithun and Krishnappa Gowtham ended the innings with figures of 3/48 and 3/54 respectively.
Rajasthan have been on a roll in the group stage, winning seven games, including three with bonus points.
Karnataka were 113 for four in their second innings with Pandey and Shreyas Gopal batting on 57 and 21 runs, respectively.
For Karnataka, Mithun finished the day with exceptional figures of three for 26 in his eight overs.