Stalling tactics on authorisation

At the end of August I requested authorisation for codes sent through to me by an Occupational The****** of whom I was supposed to see on Monday 09 October. I followed with Discovery numerous amount of times. Discovery rep**** late Friday afternoon weekend before my appointment which they knew about declining authorisation based on what they say that don't cover my chronic condition under the PMB, but yet they are paying for that chronic conditions medicine. Conflicting.