Not getting help from Suzuki

I bought a Suzuki swift 2023 model, brand new and after the first few months had issues with the fuel gauge, brought the car in twice and they couldn’t find the issue, and told me a bunch of excuses, as the gauge shows its empty after I filled up the tank, I can’t get hold of the service department as the phone just keeps ringing, my gauge showed that my car was half full and that I can still drive 280km, I ran out of fuel on the highway, the gauge is not changing at all even after putting petrol in again, I have had it, I am always on the road for work, the car isn’t even 3 years old yet, why am I paying for something that’s not working properly or can be fixed! I did not feel safe at all, as that side of the highway is a hotspot, things could have gone much worse.