Markets regulator Sebi on Friday directed Avadhut Sathe Trading Academy Pvt Ltd (ASTAPL) and its Founder Avadhut Sathe to refund Rs 546.17 crore collected from participants for providing unregistered investment advisory and research analyst services, along with interest of Rs 67.87 crore. The regulator has also barred the academy and Sathe from accessing the securities market for two years or until compliance with the refund direction, whichever is later.