Update: new domain/URL with the same toll-free number and same Google advertisement buyer: hpsoftwaresetup
Callback number from Mike John who is the Technician at HP Support: 959-202-3484. His favorite color is black, but he refuses to sing the HP Printer Song for verification purposes. He says “do not call again.”
888-400-3911 is also listed on this impersonation website: https://printerexpert.store/ , which seems to share the same JivoChat widget as well.