Nissan no parts and faulty airbags

Our Nissan NP200 , registration number JKC890 EC, was in an accident on the 7th of December 2020. To start off the airbags did not employ so the driver got hurt and we have a lot of IOD claims. It has been at at the panel beater since. It is now the 31st of March. The panel beater has been waiting for parts from Nissan. When they finished their side a few weeks ago, they took the vehicle to Nissan for a checkup before releasing it and they found that the switch that releases the airbags is faulty. It has been sent to Nissan PE for evalution and has been standing at Nissan Uitenhage for weeks now waiting for a part (again). This is really not acceptable. We have a business and need the vehicle for daily deliveries. We have been doing deliveries with our private vehicle since December. It was reported to Nissan customer care *** on Friday morning 26th of March. He spoke to Ofentse and she promised to follow it up and we haven't heard anything since. This is just not acceptable and very bad service from the side of Nissan.