Disgusting Customer Service

This have been the worst experience buying a car from their Springfield branch, the management is not interested in servicing their customers once the sale has been made, you are treated with disregard and brushed off like a peasant. I have had my car for almost a year but have had endless issues since I bought it, the backseat was damaged and had to be replaced, the drivers seat is damaged and the used cars Manager Hitesh or whatever his name is just refuses to have it repaired and is expecting me to fit the bill for something which was sold to me damaged and does not have the decency to return a person's call or follow up on complaints. I have been back and forth to the dealership with issue after issue and even the Dealer Principal was meant to call me back by the name of Kevin since last week Wednesday and up to now has not bothered. The windscreen is cracked from the inside which they used stickers to cover up, the rubber on the passenger side is leaking water when it rains or the car gets washed, after the major service there is a shudder when you break, they said the brakes are 50% when they should have replaced it knowing the car was standing in their warehouse for over a year before they sold it to me, the brake light on the passenger is not working, the alignment and balancing is off as per their technician and the handbrake needs to be adjusted, the paint on the bonnet is bubbling and the roof is already showing signs of sunburn and peeling, the car is covered in scratches which were not visible the day I took it because it had been buffed and polished, they gave me the wrong wheel spanner which I only found out when I had a punctureand it didnt fit the tyre. The service overall has been disgusting and it seems I need to take this matter higher or to the ombudsman as i can no longer accept this total disregard for their customers once the car has been sold they just treat you like waste.