I’ve just found this site. The phone number is +1-855-971-1879, it doesn’t work for me. But it worked with the chatline on the website, as they attempted to connect to my PC.
https://hpetechnicalsupportnumber.com/hp-laptop-keyboard-repair/
They are also operating this site: https://www.delltechnicalsupportnumber.com
I can now confirm they use AnyDesk and they accidentally gave me access to their machine and the number does indeed work