Claims not processed by Discovery

My Doctor and Dentist is contracted out. so I have to pay their invoices myself and send the claim through to Discovery. For the 3rd time this year and an invoice submitted on the 4th of October 2021 Discovery still has not processed the claim I send through - and I do send it to the correct claims address and receive a reference number each time. I have reference numbers for each of the claims I sent through. It's not loaded on my profile and if I phone the Customer help line they also cannot find the specific claims registered or captured on my profile. Sorry, this is not acceptable, I get the idea Discovery is ignoring these claims on purposes by not capturing them, and it's a mission to get it captured and paid after that. The helpline has to send through the claim to priority claims, and it's still then not handled as a priority. The reference related email received from Discovery specifically states that the claim will reflect within 2-3 days, which is not the case. I have lodged complaints with Discovery, but usually I just get another email with another Reference number.