The worst aftersales ever

I bought a car from their Midstream branch, paid for new shocks. After returning home, I took the car in to the repair shop for a vibration. After inspection it was noticed that an engine mount was faulty and that the shocks needed replacement. I sent emails for them to phone me back with no success. I later got through on the phone and was said to send an email. Still no response from them and the car is a danger on the road.