Discovery cannot assist me with my full refund

So I accidentally sat on my sunglasses and it broke,so I went Back to the optometrist where I made them.I opted for two pairs just incase it breaks or loosing it,the Optometrist lady advised I can make the payment in cash then submit a claim with discovery it's takes 3working days so I made the payment on 25 of June 2022 of R1400 for both pairs with colour lenses. I called the discovery the next day ,asked them which email I need to send my claim to. I submitted my claim via e-mail one week passed. I call in discovery spoke to the 1st agent and explained. He said it's he can see they processed the payment of R700 (one invoice) the second invoice was not processed "it was seen as a duplicate". The Agent then logged a ticket for me which takes 3 to 5 working days (Two weeks passes) no one calls me back to confirm. I call again speak to an agent ITU or Letu sais you were supposed to send the Proof of Payment with your invoices I said its fine I'll do it for you and send the info through this takes 3-5 working... (Week 3) I call again speak to an Agent she tells me the money was credited to the Optometrist instead of your account and I should inform them about what happened like WTH? .... It's Monday 18th of July 2022 still haven't received my R700 my app said it was paid to me ... Can you Discovery Manager please call and explain how you cannot resolve my issue????