@mjk56,
Welcome to Mayo Connect. I assume you have seen an ENT specialist for the problem.
I also had Eustachian tube dysfunction that was blocking the tube and affecting my hearing. I had an ear tube placed in an ear with a blockage, and it made a big difference.

You can find information on requesting an appointment at:
https://www.mayoclinic.org/appointments
Did your provider give you information on the reason for the dysfunction?