Flying BA XXX-LHR-SEA tomorrow in WTP.
Called to change to a later flight, same routing - quoted $2500 fare difference.

Are there any approaches for someone with OW Emerald status to getting a change without a fare difference?
Specific phone number or key phrases?
After a 3 day baggage delay on the way over, not feeling really great about the inflexibility.

Appreciate any help and insight, thank you!