Discovery is refusingt to pay for blood test through my pregnacy benefits

I'm on the Discovery Essential Smart Plan, I went to the doctor mid August because I suspected that I was pregnant and needed confirmation - the home pregnancy test came out negative but the doctor confirmed that I am pregnant and I emmeditely went for bloot test in the same health facility. I came back home and registered my pregtnancy profile of the Discovery app, the invoice from the lab amounts to R1 541,90 and Discovery only paid R204,50 and they claimed that the codes used were not linked to my pregnancy benefits. I tried to find out from them what the accurate codes should be with no luck - I ended up paying the difference myself since I didn't want the invoice to be handed over to the lawyers. The lab's accounts department sent me a null balance invoice , reflecting ICD CODE and amount paid I paid and advised that I send through the document to Discovery toclaim back the R1 337,40 that I paid. Today I received an email from Discovery that says the account was declined again because the maternity benefit registration was done after your visit to the doctor.

I don't understand this, how was I supposed to activate my pregnacy profile/benefits without confirmation from the doctor? Please can you help me claim my money back. Thank you