Bad Service At GAME STORE GATEWAY

I bought a laptop . Paid R3500. It doesn't work properly . Speakers on the laptop drags when playing after a while. Ear plugs don't work . I took it back to Game Store in Gateway shopping mall in umhlanga,, to report the problem within 5days. When I go to the customer care , after 10 minutes they get the technician . The technician arrives and we explained him the problem , he still couldn't understand my explanation of the problem . So we explained him about more then 5 times , we got no where. So we asked for the manager and the floor manager arrives. He had and attitude and rude. So I asked for a refund and I said him I am not happy with the laptop . He said me he couldn't take the laptop back because the box is opened . So I said I will contact the consumer act. The managers reply was '' DO WHAT YOU WANT TO'' Is this the service games gives to there customers . The technician was a black guy who couldn't speak, we couldn't understand what he is saying . As for the Indian store manager , just walks away while we are talking to him. It was very unprofessional and untrained staffs. Will never support game any as they are big *******s.