I reported a corrupt track on a Qobuz streamed album a long time ago. Qobuz did eventually respond and the track was fixed. But it all took a very long time (so long I cannot remember now). I eventually lost patience and bought the CD and ripped it myself. So be prepared for a long wait as there are dependencies with the Qobuz suppliers.
You might want to reach out to Qobuz in the new roon Qobuz feedback thread in addition to Qobuz own channels.