My first experience with discovery is not looking good.

I joined discovery medical scheme because I thought they were the best among the rest. I have friends and family members who always tells me good things about discovery until my wife and I decided to join them. I don't want to say I am very disappointed but I am still in shock. We are a very young and healthy couple with no major disease apart from yearly flu here and there. In 2016 I once had a stomach issue and I went to a Pharmacy and I was given gaviscon. The pain went away after 2 days. In November 2017 I had the same thing and I went to see a GP etc, I was given antacid and I felt better. We joined discovery and our membership was active on the 1st of April 2018, on the 19 the of April I had the same stomach issue and I went to the same GP and I was given some antibiotics,etc. A day later I was rushed to mediclinic in Sandton because of the same issue. All blood test were done and everything was normal and the doctor even advised me to do a scope. He gave me a specialist card to book for an appointment with him. I had a very serious hurtburn and I was rushed to life hospital and another doctor advised me to do a scope but suggested he was going to keep me until the scope was done. After 2 hours the doc came back to me saying my medical aid didn't approved the request. That it's still pending and they will only reply on Monday. I was in pain, on Monday I called them to ask if there was a specific reason why my request is still pending. The consultant advised me that a letter has been sent to my GP for confirmation etc, when I called my doctor informing him about the letter. He said to me he hasn't received anything. That he doubt if discovery have his email address. He them gave me his email address to give to discovery. I don't even know what is wrong with me and I am stressing asking myself why all the doctors want a scope etc. This is our first experience with discovery, I don't know what to do, whom to talk to. Because we don't even know what is happening. We need help or someone to tell us what's is really happening..