I recently flew BA and despite my request and confirmation at check in, my flight was credited to my BA account instead of my AA account. Is there any way to get this changed post-flight? And if so, who do I contact - BA or AA?

I am AA ExecPlat and it is a shame to miss on the miles/EQM, as well as an AA points promo that is ongoing...

Background:
* 2 leg business class flight booked on BA with one leg (EU) on BA metal and another (transatlantic) on AA.