Following my continued efforts to resolve the persistent issue of undeletable listings across multiple marketplaces (including EU and NA), I believe I may identified a crucial step that was previously missing from the troubleshooting advice I received, and in the hopes of helping someone in a similar situation in the future, I thought it best to share, as you'll get no insight with Seller Support...

It appears that before attempting to delete the listings from individual marketplaces, the SKUs may need to be explicitly excluded from the Build International Listings (BIL) or Global Selling tool.

I have taken this action for the problematic SKUs and have subsequently attempted deletion within the individual marketplaces. So far, this approach seems to be working, which suggests that the Global Selling tool may have been continuously attempting to relist or synchronize these SKUs, preventing successful deletion at the marketplace level. It was also responsible for 'bringing them back from the dead' so to speak. So listings which were long gone, even before this issue began, were revived from the ashes, if anything triggered in a marketplace where they were live.

Therefore, for future reference and for the benefit of other sellers experiencing similar issues with undeletable listings in connected marketplaces, the following workflow may be necessary:

Access the Build International Listings/Global Selling tool.

Identify the problematic SKUs that are failing to delete in specific marketplaces.

Exclude these SKUs from synchronization with the affected marketplaces.

Once excluded, attempt to delete the listings within the individual marketplaces using the standard methods (e.g., Inventory Loader file with "x" or manual deletion).

While this appears to be a potential fix, I will continue to monitor the situation to ensure the listings remain deleted and do not reappear. So far so good.

I wanted to share this potential resolution as it highlights a crucial dependency between the Global Selling tool and the ability to manage listings effectively within individual marketplaces. It would be beneficial if this step were included in standard troubleshooting advice for undeletable listings in globally connected accounts. Instead of being passed from pillar to post for over a month.

I would say thank you for reluctant, threatening, yet still, ongoing (though often misdirected) support. However, it got me no where and only served to give me blood pressure.

I hope this information helps in resolving my issue permanently and can also assist other sellers facing similar challenges.