Not receiving verification code

I am super frustrated.  I have spent the entire evening trying to get a verification code.  I have an account with the department of health to receive a COVID vaccine as I am seeing COVID patients daily.  Unfortunately, I used my cox email as my contact.  All of my colleagues used their google accounts and are able to receive their verification code.  I believe that Cox is blocking this email.  I have tried to use a different email through google, and I am able to get a code but because my account is set up under a cox email and my email and code don't match, they will not let me proceed with scheduling.   I have a ticket that I submitted but it will be 1-2 days before it will be addressed!  Is there someone that can help me sooner?