Since the day I bought the car from them 05 June 2025 never had a sleepless night

Since the day I bought the car from them 05 June 2025 never had a sleepless night.I have found that there is a problem with the car : Tyre ,colour coming off ,engine faulty lights ,blank screen when I start the car in the morning .went back to Them 4 times but unable to fix the problem.On the 23 July 2025 ive asked for a vehicle history they did not provide it ,then on the 29July 2025 called and informed Them that I am taking the car for diagnosis at Mercedes-Benz. They agreed because I have a voice recording as a proof I then send the diagnosis report back they refused to pay the money and told me to bring the car back same date The diagnosis pulled a lot of things and to my surprise I found out that they never done the diagnosis with the car before and Mercedes-Benz also pull the vehicle report which the last service of the car was in 2022. They are not taking accountability and they are full of lies and not be trusted .I cannot work with Them again