Bought a brand new car - just problems

I bought a Toyota Starlet Cross XR 2024 in Aug 2024. Only had iT for a short period and reported that it rattles. One year later, 4 book-ins (they asked to fix it again), and the problem is still there. Head office doesn't even comes back to me. The branch suggested a new car, higher payment per month. Really bad service. One buy a brand new car, just to find out that you will sit with problems.