Slow service

I bought my car in 2022 brand new kia sonet. Now my car is over heating. I took it for first time they keep the for the week then the call and said nothing wrong with the car. After 3 days driving the car it's started over heating again 😩 I took it back to kia springs the following day. It's 2 weeks now I don't have a car they said they don't find anything wrong then head office said they must check fan box now their waiting for head office to approve their warranty approval. So my frustration is I will pay for the car which they don't know when is going to be ready I'm struggling to go to work daily. Or they must provide me a car while their fixing whst I don't now. Because it's impossible for a car to over heat in 2 years. I 'm not happy and it's their car they must figure it out. Soon.