Cheating South Africans selling aftermarket parts in genuine boxes

Purchased a part from them and opened the box infront of the saleman... realised an hour later panel beater asked for incorrect part. Called and they agreed to refund. Upon arriving Michael tells me i have swooped the part and the part that's in the box is an aftermarket part yet part was supp**** by them. Don't do business with them they are cheats! Selling aftermarket parts in genuine Hyundai boxes!