Extremely poor service from Discovery Health

So I wrote 2 reviews with regards to my issues with Discovery not paying out my legit claim and finally had someone from the complaints department call me to say that the dr had used the wrong ICD Codes on the invoice, but they were closed at the time so she promised she would call the dr's rooms on Monday 6th January when they opened to ask them to amend the invoice and resend to Discovery and she would also call me to let me know what was happening - well it's Friday the 10th of January now and I still have not heard back from her. How much longer will it take to sort this matter out? Is no one being held responsible here? It's January 2020 and I'm still trying to get a claim from November 2019 sorted out! If this was me my manager would have already dealt with me accordingly, not to mention I'm stuck here still waiting for my refund!!!! I thought there was light at the end of the tunnel but clearly I was wrong - I'm beginning to think this claim will never be sorted out and Discovery is sitting with money that actually belongs to me. Very, very, very poor service indeed.