Debt Collection Dispute: Etsy holding funds for 45 days

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.

Etsy holding funds for 45 days. I've been dealing with this for about 11 months now and the situation isn't improving.

The amount being held/disputed is approximately $18,924. I have tried contacting their legal department 10 times with no resolution.

What are my legal options here? Is it worth pursuing?