marketing contact at Affirm financing for audio equipment

It's too bad that the emergence of these companies have made it nearly impossible for a seller to get paid with a check or a bank check. I recall giving and accepting them many times back in the day with no issues, and better yet, no fees!
They're supposed to earn their keep by protecting us in the transaction, but many people, myself included have had problems with them.

The website and phone number lead to dead ends.

They sound really legit...

A dead end?
How so?

Here is a place to start: https://www.affirm.com/business#id
If you get a response, maybe they can direct you to an appropriate person.
The idea of a financial service firm exhibiting at an audio show seems odd to me, especially if it’s a show for consumer attendees, not an industry trade show. It would be like having a PayPal or Square exhibit booth.