Cannot find datasets for an Analysis in QS to find owners name and request ownership

When I try to create a copy of the analysis, i get an error that I do not have read access to underlying datasets. When i search for some of those datasets in QuickSight to find owner name and request access, I cannot find them in QS.

Contact your QS admin and ask him to provide list of all Authors of the site. And send an email to all of them asking for read access to the dataset. The setback of QS is, even Admin wouldn’t know who the owner of the dataset is, only the owners of a dataset can see/view who the co-owners are and can grant others access.

For Amazonbi, who do you contact?