How do I handle eBay siding with buyer on false claim?

I publish illustrative scenarios prepared by my practice. All participants and conversations are fictional. The fictional posts are not posts by real users, accounts of client experiences, or reports of actual results.
Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice. Laws vary by jurisdiction. Consult a qualified attorney for advice specific to your situation.
Hypothetical question

Has anyone dealt with something like this? I'm not sure what my options are.

eBay siding with buyer on false claim. I've been dealing with this for about 8 weeks now and the situation isn't improving.

The amount being held/disputed is approximately $24,193. I have tried contacting customer support 6 times with no resolution.

What are the risks if I pursue this? What's the likely timeline?

Illustrative response

Check their terms of service - there might be an arbitration requirement.