Impossible to reach Customer Support agent

[LibertyBuild]

Does anyone have any advice on how to actually get any tech support from HP, at all? Every time I have an issue it takes at least 45 minutes to reach a human & then, nine times out of ten, they are unable to help with the problem, they walk me through the basic support of "turning things off & back on" & can give no help further. When I try to use their chat system it always tells me the the serial number I’m entering is invalid, which is an insane roadblock bc I'm literally copying exactly what is written on the printer. I work at an office building so I try to help many tenants with their printers & it is the bane of my existence trying to get support from HP.  Any advice is helpful, thank you!

[BeemerBiker]

This link shows how to get warranty information.
Click here to read how to dispute a warranty.

To contact an agent:
your support page
Select the product you need help with and scroll down to support options.
Select "Contact us". You can change country and language if necessary.

You probably should register with HP's CarePack to obtain email and phone number support
How do I contact the Care Pack Registration team ?
Click here

If you are out of warranty, you might consider asking Microsoft's Copilot for advice. Be sure to identify your product, what the problem is, and ask for videos.
There is also HP smart friend but Copilot is not restricted on answering certain questions.