Bad Service and Repairs continual faulty

Newly purchased in 2014 June. Went on vacantion. On 700 kilometers I phoned the . agent, Hyundai Upington and complain about aircon not functioning. After our vacantion we returned the vehicle to the agancies to repair the aircon, still under warranty. Afterwords went to Cape Town, aircon still not fixed. Upon return, aircon was repaired according to agent. We went to Barkley West, 4 women in the vehicle for a church conferrence. Aircon still not working. On the road I phoned them again and they just told me to bring it back. All together the vehicle was 7 (seven) times with them . I am not satisfied and they refuse to do proper workmanship/ The also cannot give me a satisfactor explanation on why the aircon is is not working, I refuse to accept this as the vehicle was purchased brand new