Breakdown over due

In January 2025, I took my Magnite Acenta CVT 2023 to Nissan Witbank for a breakdown, and they determined that the engine was malfunctioning because it was not producing any power. My car hasn't returned as of today, June 2025. When I ask why, they tell me that they ordered an engine, but they are not sure when it will arrive because of a backlog. They didn't bother to give me a courtesy car, and I still don't have one. Because Witbank Nissan failed to provide the necessary Witbank documentation, my request for a courtesy car was denied at Nissan SA.

Nissan is failing me because I am paying for a car that I am not even driving please intervene.