Made sale with false information! !!

My father went to Foschini to buy a new phone on 7 February 2016, he wanted a phone that takes two SIM cards. The salesperson sold him the Mobicel Onyx, and told him it takes two SIM cards. When he got home he got one slot for the SIM card. He called me I got home and realised that there isn't a second slot for a SIM card. I advised him to go to the store to enquire. He went there today, 10 February and he was told that the phone only uses one SIM card. He requested a refund as this is clearly not what he needs and was told that he can't return it as it is not damaged. My question is why was the sale made with false information, had he had known that it wasn't what he needed he wouldn't have made the purchase. Why was my Dad taken for a run, what are the ethics that guides the company. Is this even allowed by the Consumer Protection Act? All he wants is to get his money back or what he wanted in the first place. Fix this as he will now be forced to pay an account for something he never wanted or needed.