Renault 2019 EDC Clio Faulty

I bought a brand new car from Renault Wonderwaters in July 2019. I had an issue with the bottom part of the car failing off after the first month and was told that I must have created the damage by hitting on a hump or something and was forced to pay the labor of this getting this fixed , which i did because they refused to release my car. I was very dissatisfied with the service but as a first time buyer i thought i should just let this go as it wasn't that major. I started experiencing more issues with the car , when i hit the brakes there's a squeaky sound , which started making me uneasy as i travel to work with this car daily and not sure if the brakes will fail on me. A week later my petrol guage started acting up , where if i put in 700 worth of petrol the guage doesn't move. I went to a different garage on the Sunday of 20th to see what would happen if i fill it up completely and the gauage was still stuck on the same point of me filling up the day before. I drove the car for two days and tried filling it up but nothing changed. I called the branch that i bought this car from and told them how unhappy i am with this. How can i brand new 2019 model have so many issues? I haven't had the car for longer than 4 months and i'm also getting such issues. I have booked this car in for 29/10/2019 and want Renault to take responsibility of selling my a faulty car. I pay so much money monthly for a car that doesn't even make it seem worth.