repaired vehicle sold as demo model

bought a discovery sport from cmh land rover cape town in july 2018. demo model approx 8000kms on clock. was guaranteed no damage to vehicle. 2 months after purchase a friend, car salesman, of mine saw car and told me left side of car is painted. took car for dekra report and they confirmed that most of left side was painted and there were pit marks and file marks and that paint will start fading and peeling with time. ie both doors fender and bumper were painted. they refusing to take car back saying assessment has to be done by land rover approved..... tried every land rover approved panel beater and all said car was painted and poor workmanship but all refused to give in writing as they could lose future business from land rover. eventually got help from forensic investigators who managed to get report from land rover approved panel beater. august 2019. 1 year later... now their lawyers oppossing matter saying i must have damaged vehicle in interim. i have got netstar reports showing i never took car to any panel beaters. now going to high court and legal fees are rocketing. this seems to be delay tactics by cmh group knowing that people would give up considering legal costs. and all car programs on tv tell you buy from a reputable dealer....... i listened to their advise... and this is what i got