Hamadi still hasn't provided me with my invoice

I went for my COVID-19 test on 4 January 2021. Shortly after getting my result, the clinic closed due to irregularities. They are now open again and I urgently need a PROPER invoice in order to claim the amount from my medical aid. I have sent numerous e-mails and have received no feedback. It has been a month since I got tested. Surely it can't be that difficult to just send me my invoice for something I already paid for!!!!!