Discriminatory phone communication system.

I have been a member of Discovery Health for many, many years. I have no complaints about their service. I do have a massive issue with their communication system. I am deaf and cannot use the phone so I cannot contact Discovery Health in any way. They want me to log in but they are sending the OTP to an obsolete email address, not to my phone or to the address that they are using for my statements. Forcing people to use only the phone is discriminatory (they say you can use Whatsapp, but they require a login which in my case involves a phone call).