Every wallofcerts.link address points to a certificate hosted on Wall of Certificates — a copyright or takedown request should be filed against the certificate itself, not the short link. Use Verify a link to check a link is genuine, then send your notice to with the link address and a description of the issue. Requests are reviewed and acted on within 48 hours.
A valid takedown hides the underlying certificate from public view pending review — the same 48-hour commitment and hide-not-delete approach described on Wall of Certificates' own DMCA page applies here, since this domain has no content of its own to remove separately.