Given the TATL JV, it should have been easy for AF to rebook the OP onto a DL operated flight, although some business class RT tickets originating in Europe tend to have fare rules that say that the flights must be flown exactly as ticketed or all value is lost.

The OP is basically asking for AF to fix the ticket/seat issues as a customer service gesture given the incorrect information supplie3d by the AF agent.

OTOH, checking or asking here would have resulted in accurate (subject to aircraft swaps) information about AF seats. However, given the AF tendency to swap aircraft and their horrid seats and configurations in business class, I just avoid flying AF TATL even though their schedules would be more convenient for me.