Bad service

I had the worst experience at Wonderwaters multifranchise. I bought Renault clio 2015 on 31 May 2019, the dealer failed to disclose to me that the car was involved in a front smash. i was informed that they are not allowed to sell cars which were involved in an accident should i have known i wouldnt have bought the car. After i have purchased the car, there were so many things which were wrong with the car which forced to do a thorough check and discoved that the car was involved in a front smash. The bumper is falling off as the clips were out, the head lamp is broken and loose which causes the dust to come inside the light and the light are not stable when driving at night. The aircon was also not working . The bumper is oversprayed which is evident enough that the car was involved in a front smash. I took back the car to the dealer on 14 June 2019 and i want to cancel the deal. The dealer want to fix the problems on the car but i have lost trust in them as they failed to identify those problems. what are they going to fix and what guarantee do i have that the car wont give me problem in future. I feel like they took me for a ride and the car does not worth the price since it was involved in a front smash. The dealer principal Scott Skinner is aware of this issue but they are not giving this matter a priority. Please help i dont want the car anymore