Could not fill the fees for CCMT first round,does that mean my seat is cancelled?
YES . Since it is a procedure you had to follow which, you are currently out of the admission process. But you still have a chance in the last round which is generally taken after all the main rounds of admission are done. This extra round is usually for the vacant seats left in the end. So, you still have a chance to get admission though it may not be the desired seat you wanted.