Contacting the help desk

URGENT Please can somebody tell me how to contact a real person who will respond to an email? Zoom is sending me bills  for services which I do not have, to an email address which I no longer use. I cannot spend days and days of my time wading through FAQs, especially when there is nothing there which corresponds to my case. it must be possible to contact these people in some sort of sensible way. SOS. Thank you, Claireb3