Often an issue with a podcast is a problem with one of the podcast distributors where listeners find your podcasts. In cases like these, where Megaphone can't help, you may want to reach out to the podcasting platforms directly. Here are the public Support Contacts we've been able to find:
Apple Podcasts (iTunes)
You can send an email to: podcastsupport@apple.com
Stitcher
You can send an email to: partners@stitcher.com
You can send an email to: podcast-support@google.com
Spotify
You can send an email to: podcasters-support@spotify.com
iHeart Radio
You can submit a ticket to (select "Technical Issues"): https://help.iheart.com/hc/en-us/requests/new?ticket_form_id=156867
NPR One
You can submit a ticket to (select "Request Technical Assistance"): https://help.npr.org/customer/portal/emails/new
TuneIn
You can submit a ticket to (select "Incorrect information about a station or podcast"): https://help.tunein.com/contact