I'm AA Platinum/OW Sapphire. Purchased seats through IB on their metal, but because of schedule changes, they needed to reroute me and my party of 5 onto a BA flight (LHR-JFK) which is actually operated by AA. So IB couldn't get me seats and said I had to call BA. When I called BA they only had available terrible seats in the back even though expertflyer is showing tons of open seats (and premium seats) closer up.... but when I told them that they said they can only book what they got from AA. So the question is.... can I somehow get access to those premium seats (or even other seats closer up) through AA because of my status?