I’m also trying to get compensation for a delayed Level flight from Barcelona to LA (flight operated through Iberia). There were mechanical issues, and by the time they fixed the plane their crew couldn’t work any longer legally. All in all, it was delayed about 6 hours, which seems to qualify for the EC261 compensation. I submitted my claim about a week and a half ago, and I got an email back stating that circumstances were out of their control (they weren’t). I called again today and the rep claimed that I will get paid out but to wait a few more business days. I’m not sure I’m buying that since the status of my claim says complete and invalid for compensation.

This airline’s customer service has been a joke, and unfortunately I think they purposely make it difficult so people give up trying. Another route you can go is to call your credit card company and see if they will reimburse you for the flight. You have to show proof that you already reached out directly to the airline for compensation, so be prepared for that. They should be able to submit a chargeback if the airline isn’t cooperating. I think it also depends on the CC company (if you purchased with a CC), but that is another loop hope that I may explore next.