First thing to check, is if the file(s) in question check 100% against your torrent in your torrent client.
If yes and it plays with sound at your computer, it is most likely not an issue with the torrent and the shared file, but an issue of codec support on the computer and/or player at the downloader side.
As well, if yes, re-uploading another torrent for the file won't change anything. Best thing is indeed to contact the Helpdesk with details, e.g. which torrent and who complains.
The Helpdesk would only delete the torrent, if it is verified that the issue is with the torrent's shared file.