FeD uP!!!!!

Where to start....got my Oppo Reno 5...when they opened the box and wanted to start the phone the phone did not come on? They guy went to the back with the phone came back and it was on and on 55%. I asked the guy for a new phone because acording to me if the phone does not want to come on its a OBF (out of box failure). So i asked the guy for another phone and he said aorry man i can not do that. So i told hom this phone ia going to give me problema and he just stated that thats the rulea of Vodacom. 18 days later the phone started with its problems. Took the phone to vodacom and they just said sorry need to send the phone away. Now almost 4WEEKS later i still have no phone? And i went to vodacom oh sorry mam your phone is back but with NO SIM TRAY... We are waiting for it but its book in under another job number? How do i know its my sim tray? Im fed up now... I did not even received my contract paper's from you guys. I request a new phone.