Not wanting to pay for an Antigen test done at their network partner

Really disappointed in discovery, i submitted a Antigen test claim, they told me to get the codes which were not on the invoice provided by Dischem, I contacted dischem and they told me they cant give me a procedure code because they didn't do the test at a lab, they can give me the IC10 code. The consultant did conference call and then told me unfortunately Discovery wont pay my claim because they need a procedure code. As expalined by the pharmiacist at Dis chem they dont have a procedure code as its a rapid test done which gives you results in 10min and taht is not sent to a lab so they cant provide a procedure code, Which i understood because this is not a procedure? Discovery says the benefit for antigen test is there but they don't want to pay because of the procedure code? Also why does discovery treat a PCR test and an Antigen ****id test) the same? A PCR test goes to a lab where you will get a procedure code and an antigen test is something you do outside at a station and you get your results there and then? Also on the discovery website they say members can access an antigen test at one of our partner networks which include Dischem so why was I advised that my claim cant be paid?