Worst car dealership experiance

The worst car buying experience I've ever had. On the day of viewing the vehicle the battery was flat, in fact it wasn't even the correct one for that vehicle. To small and poles were the wrong way around. Waited for a while so they can find a battery to fit that vehicle. Pointed out other defects that have to fixed before we take the vehicle. Broken door rubber, broken mirror. Obviously, a new battery. We were assured that it will be replaced. We decided to take the vehicle. We arranged for the vehicle to be delivered to us because at the time we couldn't collect it. They agreed. vehicle was delivered but the driver told me that there is a problem with the battery. It left him stranded because the car died and he wasn't able to start it. On inspection I found the terminals completely loose, I could remove them by hand. The actual battery was also loose. Moved around in it's place. I fixed that. The door rubber wasn't replaced either. When I called to ask why they said that they don't know how to. Made me drive all the way to their dealership to show them how to remove it. There was no emergency triangle in the car, which is required by law. Collected it when replacing my own door rubber. Unfortunately, I failed to notice that they never put the intake pipe back in the engine bay. I figured they would when they replaced the battery as you actually have to remove it to gain access to the bolt that holds the battery down. It can be done without removing it but it is cumbersome, less space. Without that pipe the car would perform poorly as it now constantly sucks in hot air from the engine bay instead of cold air from the outside. When I made them aware of it, they say that all the parts were there and it's impossible to be missing. Even after sending a picture of it be missing they still deny it. Now it's a back & forth and getting hold of the manager is impossible. You have a better chance of getting service at a Home Affairs on a Friday afternoon just before closing. We are still waiting for someone to contact us. It's been two weeks now. I regret purchasing a vehicle from this dealership.