I usually have no issues submitting claims with Discovery Health but for the past month, none of the claims I submit on their website go through

I usually have no issues submitting claims with Discovery Health but for the past month, none of the claims I submit on their website go through. Even when the claims clearly say they've been received and I get a reference number. Only when a Discovery agent or my doctors submit claims are they being processed successfully now. I tried to escalate this issue to a Discovery chat agent, Sibusiso, and was essentially told I am lying because I didn't submit any attachments (despite submitting a JPG or PDF file each time) and that I must have not submitted the claims. I have never had such outright arrogance or rudeness when dealing with a chat agent. I would honestly not give Discovery Health even a 1 star for this experience and if I hadn't been with them since 2017, I would immediately be moving my medical aid to another, more helpful company. Shocking experience.