Chronic medication not delivered, pillar to post about settling my claim.

I ordered medicine on 14 July 2021 and got a message on 16 July that it has been dispatched. At that time I already ran out of medicine. On 17 July I went to the Chemist to buy it at the chemist. They said that they discovery system says that the medicine was issued to me yesterday and cannot be issued now. I told the chemist that I have no medicine with me and therefore, I will pay for it myself which I did. Up to yesterday, the medicine did not arrive. I emailed them a claim receipt and an invoice from the chemist yesterday. Now they sent me an email that the documents I sent them are incorrect and I must email or call them to find out what they want. I called them *** and my call keeps getting cut off after filling all my details and choosing the correct options. Also yesterday, I phoned to enquire from them on medi express about my medicine and ended up on a different medical aid and not discovery while I have dialed the correct number *** and selected MediXpress. This is not the first time this happens. Whenever I call Medixpress, I end up somewhere else where I am told that this is a different medical aid. THEIR CALL CENTRE IS ABSOLUTELY USELESS!!