Complaint about Renault Polokwane

I have Renault Kiger that is 5 months old. The windows and lights are not working and it's loosing power. I took the car back to renault polokwane today. Natalie the lady on the help desk told me that if I spilled any liquid in the car, it won't be covered by warranty. They checked the car. They found out that it was electrical faults. Now she say if it's mice/rats that ate the cables it won't be covered. The question is that are they looking for excuses not to cover the car. It's only been 5 months and I'm not happy with the car. It is only 5400km hasn't been in for service yet and I'm already complaining. The annoying part is that Natalie is not even touching the fact that I reported sound from the from tyres and loosing power as well.