Return of item

I purchased a dress (signature collection) from Edgars Potchefstroom, Mooiriver Mall on 2018-11-17 @ 14:22. I have never worn the dress and decided to return it thia morning 2018-12-17 @ 10:10. Upon my arrival i was told by the Manager, Jack tat i cannot return it and he will not accept it. I have never worn the dress since my purchase and it doesn't have any damage to it. They even smelled the dress to make sure. But they refused to take it. According to the policy at the back of the slip, any item can be returned within 30 days. So what seems to be the problem?