NOT HONORING CLAIM

I put in a claim to Discovery on the 23.4.2015 for a specialist visit. On the 05.05.2015 i was told my claim was rejected, this was after receiving a ref number from Discovery prior to my visit to the specialist and several emails as to why my claim was not paid out. According to Discovery it was a system error. After several more mails to my consultant i was told that the doctor is not on the network and that i will be paid the Discovery Rate. Prior to putting through a motivation, getting a referral number and putting in my claim and several mails from my side i was not advised the specialist is on on the network. I feel that it is unfair as a member I was not informed that the specialist will not be covered in full. I feel the onus lies on Discovery to advise the members that a certain specialist is on the network when a referral number is given from them.