No-Show consequences

My company booked OFC on Friday and Consular interview on Monday. The company could not provide me client invitation letter as the client postponed the business meeting. I attended biometric on Friday and on Friday night we got the information from client to postpone the trip. Now cancellation is not permitted as there is no time to cancel consular appointment. What are the consequences of No-show now how do i inform the fact to the consulate. Please reply.

Thanks in advance