Faulty Samsung machine

Honestly speaking am not happy with the way am being treated by greenstone pick n pay after speanding R3999.95 purchase Samsung washing machine Wich was on a display as it was the last item on the store I've been assisted by a lady called shaida. She didn't even bother to explain the I can do the RAIN CHEQUE on the last item Wich was on special now am suffering as I have spend my money buying thing Wich is now giving me problem and people from pick n pay are refusing to exchange the machine for me . The machine has already being fixed twice I don't want it anymore . When I go to pick n pay dem referring me to deal with people from Samsung whereas I don't even know where or who are those people I've spend my money at one of ur store now I have to suffer whereas I've bought the item I needed but it's a faulty item this is really bad I've took the machine back to pick n pay store where I've bought can you please assist so that I can get my new machine or my money back I call customer care where they told me that they cannot tell the store what to do . I've told them y not bcoz the machine has already being fixed twice with no success so I don't want it anymore