You can challenge or dispute if you like (I understand you're not) but I am a TA with 30 years experience. I can see everything that is done on a booking on the agent site. I can see when Celebrity or a client changes something or when payments go in or out, excursions, whatever it is, it is a line item on the booking. You do have to look for it, but I have always done this - look at exactly what is going on with a booking "behind the scenes". It is easy to miss and if the TA is busy, may not look until 4 days before a client's cruise to make sure all is good. Human error on either Celebrity's or TA's side. I would give them both some grace. It happens. ESPECIALLY since the return of cruising after Covid.