bad service from store manager

I am very disappointed with the service I recived from foschini, I bought a perfume at the Cresta branch on the 12th of June and I realised that it was not the one I wanted, the follow day I went to one of their big braches in Elloff street johannesburg to exchange it, I was told by the lady manager that I had to go back where I had bought it, for the first time after shopping @ foschini for many years i had heard such nonsense. I had the slip and the product was still close I had not even opened it but that manager couldn't have cared about that, and knowing very well my right as a customer, I can return any goods within 30 days with the slip at any big branches where the same product is sold. If this is one of thier new polices, then I rather not be shopping at foschini anymore.