So this is how I deal with folks that will not allow for communication with a mute person. And I checked ADA to be sure, Mute is a protected class. And they provide a handy link to file a complaint. So here is my complaint to the United States Department of Justice Civil Rights Division.
Just another thought:
Could you/would you use a TTY Phone?
Well done Russ! It's shocking that they haven't already addressed this as a provider to folks with disabilities.
Be the change Russ, thanks for advocating for others.