My travel companion had some difficulty flying Delta from SEA to JFK in June. Her flight was cancelled, and she was subsequently rebooked on Alaska Airlines for the SEA to JFK portion of her trip. She received mileage credit for the JFK to SEA leg (which was flown on Delta), but not for SEA to JFK. Is it possible for her to receive that credit? She has had no luck asking customer service so far (been told to wait on two separate occasions), and the "Mileage Credit Verification" form on delta.com says "We're sorry, we cannot fulfill your mileage credit request because the activity is not eligible to earn miles per Delta rules".