Change in Google email

Last year I changed my Google Domain and email address.  What I had not realised was My premium or Pro Zoom account login was only my Google sign in.  I have now way of accessing my Zoom Account (which remains paid) and if I try to change the password it directs me to use Google Account login.  I cannnot seem to reach a human at Zoom who can assist with this.  Using the bots i need the host key (which of course i do not have.  Help me please!