I used to book flights with aggregators. After an experience with Priceline (owned by booking.com) I will never, ever again.

Had to cancel a flight due to the whole family getting COVID. When we tried rebooking using the credit, we had to call in to a special number to deal with an agent. This agent had a different flight price list than what was publicly listed - and of course the agent’s prices were higher. They were so much higher that it was cheaper for us to throw our credit out and book online than to use our credit and book through the agent.

We spent hours railing against this. Calling, calling back, trying different agents, calling the airline, ombudsman, etc. I even wrote with receipts, call, and chat logs to CBC’s expose section though never heard back.