It is really unusual,there is no provision for cancellation of application for Mutual Transfer in the law. However you may also write to the HM, Secretary of your school with a copy to Chairman to the CSSC. If your school remained absent in response after consideration of your application and want to retain you t your school, and subsequently inform the Chairman CSSC in writing the process may not be accepted by the CSSC. If that does not work attend the hearing and put your objection and request them. So far as my knowledge goes, in your absence from the hearing, the CSSC will not take any decision in this regard. But it may bring lot of tension to you on 18th May whole day. My suggestion is to attend the hearing with the representation from school authority will serve better. I presume. It is entirely based on working knowledge. As there is nothing in the law. You may call me now or at any emergency.