Etihad changed our seats and moved us 10 rows back without any notification — after we paid for seat selection. Has anyone dealt with this before ?

We booked seats on an Etihad flight and paid extra for specific seat selection. Without any email, SMS, notification, Etihad swapped the aircraft type and reassigned us to seats 10 rows further back — seats we never chose and wouldn't have chosen.

We only found out when we checked our booking. No refund offered, no apology, no heads up. The person on the call ...kept saying it's similar..I kept telling him we didn't choose those seats refund the seat selection charges ?

Has anyone dealt with this before? Did Etihad make it right, or did you have to push hard? Any tips from people who've successfully escalated this would be hugely appreciated.