Etihad Airways Etihad Guest - Original routing credit

Booked SYD-CAI return in F, but equipment was downgraded to 2 class AUH-CAI-AUH. Shouldn't EY provide original credits based on F and not J?

Should: Yes. Will: No. Just hung up with the EY call center, again clueless agents for a simple request. A shining icon, "from Abu Dhabi to the world" ...