Worst after sales service ever

. I bought a Swift in 2016 from in 2017 i reported rust and eventually in 2018 when a panel beater wrote my car off for rust did they replace my vehicle. They then went and sold my old vehicle to someone in Pietermaritzburg. They obviously never told anyone. The "new vehicle" started giving throuble when after a few months my car wouldnt start, the rear bumper clip was broken. All of this was reported at the first service. Nothing was done. A few months later I had to replace my windscreen wipers amd bought a new battery at my own cost. I called the branch and they said i must go in for them to check the battery. I couldnt as i own a company with my husband. The seat has started to sink amd i have not one reply from anyone to my emails. Then it came back after some investigation my car was a demo model and sold in march! I bought it in May 2018!