REFUSAL TO DELIVER ORDERED ITEM EVERY AFTER PROOF IF PAYMENT WAS GIVEN

Hi. I am required to be 24/7 on oxygen due to my condition and can not even leave my house to hang up washing, I ordered a portable oxygen concentrator from your Durban branch in July 2020, the account was paid by the DOD on the 03/08/20 and I emailed to proof to the accounts department. I called afrox accounts to confirm if it reflects in order for me to get my machine as it is urgent. I was told nothing reflected, I called my medical finance department and they confirmed payment was made. Between the 03 and 10 Aug i contacted afrox accounts and according to them nothing reflected. When I called at 0900B on the 11th Aug I gave the accountant 5 numbers to call my medical herself to confirm payment when I called at 1230B nothung had been done. Today is the 12th Aug and I called and no one is answering. I have become desperate now and after all this AFROX is refusing to deliver my machine