Dissappointed in Discovery, yet again

I've been trying for more than 2 weeks to sort out why discovery doesn't want to pay a doctor's account. Waiting for them to pull a call, not getting back to me. I think this is very unprofessional, but if I refuse to pay my monthly contribution, then my medical aid will just be cancelled, but discovery can refuse to pay a doctor, not giving an explanation for my proof, and I must look like a fool to the doctor. Unacceptable!!! Spoke to different call centre agents, and not one is giving me the same answer, now that is promising!!