Problem message

hello everybody I have a problem with a transaction with payment sepa …the seller no longer responds after he received the transfer … about 10 days ago. from then I opened a mediation I need a referee who sees the transaction … I also continuous problems with bisq that I have provided to update to the latest version.
this below and the transaction id: do I ask for help from someone who can give it to me?

9c1177d782a0970b7d73d526f8cc9da3b4a4691aa44a280d880fcbc56ab30db1