I had a flight that I cancelled with American Airlines due to COVID in March. American Airlines gave me a travel credit for my ticket (valued at $230), as opposed to a refund. Yesterday I attempted to book a new flight with American and apply that credit. They require that you call to apply the credit vs. do it as part of the online booking. I had already researched the flight I wanted and the cost was $240 for the Basic Economy class. When the agent went to book it, she told me the flight was $309. I asked her why the price was so much higher. She advised that when you are using a travel credit it MUST be applied to the "Main Cabin" fair and not the "Basic Economy" fair. Has anyone ever run into this before? It seems like a complete scam. I expected to pay an extra $10 and they want an extra $79 for the exact same thing. I asked for documentation that my original ticket purchase had restrictive terms in line with this policy and she could not produce any documentation of such. I believe that I should be able to apply my credit toward any ticket tier that I would like to buy and pay the difference. Has anyone run into this before? Advice to handle this dispute?