Claim Refund Issue Still Unsolved

With over 9 very long (pre-paid) calls with Discovery Health, more than 18 emails in correspondence, and over 3 months in the "process", Discovery are still unable to process (and reprocess) a claim refund to me, and this despite my compliance with every one of their requirements, and their unkept promises. I have no other option but to write this complaint on this platform because Discovery are unable or unwilling to take ownership of this problem and see it through to satisfactory resolution. Even their complaints dept (in Durban?) made an unkept promise to fix it. I'm so disappointed at Discovery's decline in the customer concern and member service that you were so good at. Really, what's next to do?