Q: My daughter and I traveled from Toronto to Paris in April 2017. Our return flight was with WOW Air. The night before our return, I received an e-mail from the airline saying that the plane had been in a mishap.

It was a plane that carried 350 people. WOW replaced the aircraft with one that could carry only 220 people. The airline said that if anyone chose to go to Toronto another way, it would refund the cost of the flight and give us each 400 euros to compensate us for the hassle.

I had to be at work the following day. We e-mailed the airline to say that we would take it up on its offer, and we booked another flight on another airline and went home on the day we were scheduled to fly back.

WOW Air refunded the cost of the return flight promptly. The airline asked me to file a request for the promised compensation, which I did. WOW indicated that there would be a wait of eight to 10 weeks. Five months later, I received an e-mail stating that the airline had processed my claim and that my daughter and I could receive 500 euros each if I took the offer in the form of a flight credit or 400 euros each in a cash settlement. We opted for the cash settlement.

It's been over a year since WOW promised the money. This seems very unfair. There is no way to communicate directly with someone at the office. Can you help me?

A: WOW should have paid you each the 400 euros at the same time it refunded your airfare. A delay of this length is inexcusable.

Let's back up a little. Your return flight experienced a "mishap," but WOW replaced it with a different aircraft. In doing so, it went from a larger aircraft to a smaller one. That meant WOW Air had too many passengers.

Interestingly, since your flight originated in Europe, it's subject to a consumer law called EU 261. WOW Air seems to have completely glossed over that little detail. Had you waited and allowed WOW Air to bump you from your flight against your will, you might have received an even more generous compensation.

But you took the WOW Air compensation offer, so this issue comes down to the agreement between you and the airline, not EU 261. You had that deal in writing, but it appears that the airline was noncommittal about the timeline for reimbursing you.

One way to speed things up is by contacting a supervisor. I list the names, numbers and e-mail addresses of the WOW Air customer-service executives on my consumer-advocacy site, elliott.org.

As I reviewed the paper trail between you and the airline, I saw no reason for this delay. You were entitled to immediate WOW Air compensation. I contacted the airline on your behalf, and it paid you the 800 euros it had promised.

Christopher Elliott is the ombudsman for National Geographic Traveler magazine. Read more tips on his blog, elliott.org, or e-mail him at chris@elliott.org.