On this link https://azure.microsoft.com/en-us/marketplace/faq/ , Question :
Is there a support forum for Azure Marketplace?
There is an Azure Marketplace forum and it can be found here.
"here" is not Hyperlinked.
Thank you for letting us know. We’re working to update the link. In the meantime, you can find the Marketplace feedback forum for new suggestions here: https://feedback.azure.com/forums/216369-azure-marketplace.
There is also a Marketplace support forum here: https://social.msdn.microsoft.com/Forums/azure/en-US/home?forum=DataMarket.