poor client service

This incident happened at the Cavendish store Forever New, however i purchased a dress at forever new waterfront, and i had to return it due to certain reasons, but even before i bought the dress it had no tag but how ever the sales agent made a note on the receipt that i bought the dress in that way.. Now i get to Cavendish store they could not return the dress because they don't have that stock in store i been part of retail myself for soo long but the service i got was really not ok, now the store manager forced my to take something else as they did not have money on the till to refund me, only advise she gave me is to take the dress to the same store i bought the dress at.. does it work that way now?