Discovery is discrimanatory to Deaf clients

I am trying to getpre authorisation for a hospital procedure. I am deaf and cannot do it over the phone. Surely surely Discovery must have tjousands of clients that are hearing impaired. WHAT on earth is a Medical aid doing that is discrimanatory to diabled clients. I am totally frustrated and humiliated that I simply cant get pre authorisation on line or? Come on Discovery - get your act together