Looking to refinance flight school loan

A few years ago I took out about $55,000 worth of loans through Zuntafi add something like 16% interest I’m still paying 700 $800 a month looking to refinance my Flight school that I went to has been sending out emails saying that American Airlines credit union is a available for refinancing and multiple people have had their payments reduced by hundreds of dollars. But I’m skeptical and wanted to reach out and see what everybody’s thoughts were if there was somewhere better or what the general experience with refinancing has been.