GP on Discovery Keycare Plus Refuses to consult with sick patient

Tried going to a GP nearest to my home, had made an appointment the morning, upon arrival showed my virtual discovery card to the receptionist but she told me it was too late to call for Authorization. The receptionist went to ask the doctor whether he would assist a lady that was on the keycare plus option and he refused and said I needed to pay for the consultation in cash. 1. Please note discovery's app showed that this particular GP was fully covered on keycare plus option 2. My membership status was active but the receptionist didn't bother to verify any details at 16:35pm Friday 29th May due to her response of discovery being closed. When I left the GP's practice after not being seen, I was more sick than when I entered the facility. I did however contact discovery because it didn't make sense that their offices are "closed" but that the doctors rooms was still open so how could patients obtain authorization to see a GP. At 16:50pm I had a long conversation with a Discovery consultant, hence the GP's receptionist was wrong.

I need to know why Discovery is partnered with this particular GP when he clearly deviates from following Discovery protocol and in fact makes up his own rules?

I want to know why this GP showed a sick patient away with false claims of not being able to obtain authorization without his admin even attempting to verify any of my details?

If a clear logical reason can't be given why this GP didn't want to assist a patient on the Keycare Plus option then I will cancel this medical aid because I will then end up having to pay cash more than making use of this supposed medical aid.

This insident was embarrassing and unprofessional.