Worst car buying experience

Honestly the worst decision i have made was buying a car from Webuycars silverlakes branch. on the 31st of august 2021 i bought a car and i understood that i would fix the issues, a week after buying the car paint started coming off the bumper and interior globes stopped working, so far i have re-sprayed the car, put new headlights, changed interior globes and fog light globes, new tyres,bought a spare tyre which the car didn't have, bought a new hooter , aircon blower and resistor, new clock springs after spending a 100k in a month on my car i went to vw to find out why my lights arent workings and they told me my ECU,BCM and lock system is from a different car and i would lose my warranty. when i spoke to the people at webuycars they were the most rude and unhelpful people the lady went as far as saying if you are not happy you are welcome to go to the ombudsman just showed she was not interested. i also requested the original advert as the car showed that the warranty of the car is valid until 2024 and no one could retrieve the advert for me.