Specialist short paid

In April I went to the dentist who diagnosed me with temporomandibular joint pain and referred me to a maxillofacial surgeon who I paid cash R500 on the 10 June sent receipt to GEMS and up to now no reimbur*****t

GEMS Short paid the maxillofacial surgeon on the 17 June which was a follow up they paid GP's in full for the money that is more than what they paid the maxillofacial surgeon who is a specialist They paid him R294.50whereas they paid GP's R386 and,R422 respectively Why pay a specialist less than the GP