I had an interesting situation occur this week. I had a business seat Canada-LAX-Melb-Bris and on getting to Melb had to change my boarding pass because my FF number wasnt on it. Received a new BP, didnt look at it but on boarding Bris flight, was downgraded. When I enquired, I was told that a FA was given my seat due to their EBA. I explained my thoughts and my status and that this was a paid flight and I had just flown 2 sectors incl long haul but to no avail. I also suggested that there were 11 other PAX in Business so why me.? Were they all CL or P1? No response. I boarded, sat in 7D and the crew were very embarrassed and mortified. I have written a letter to the VIP team but yet to hear from the command centre.