Disrespectful staff member and faulty items

Clicks Lorraine : Port Elizabeth *** Store manager: Luncedo i purchased a hair dryer online 3 months ago to the Value of R600 and the hair dryer is faulty. it has smoking coming from it and makes a grinding sound.i took it back with the slip as well as the packaging and asked for an exchange and the cashier then called the store manager to assist me. He took the dryer from my hands and had a smirk on his face and said to me that i definitely let the hair dryer fall, he doesn't even need to investigate. he then plugged in the hair dryer and told me, yes, just as i suspected , you let the dryer fall and your warranty doesn't cover that. i told him that i am a natural woman and i very seldom use a blow dryer and on all 2 occasions that i have used the blow dryer in the past 3months it has made that sound. He got irritated with me and told me that my explanation is irrelevant if i am only bringing it back after the 3rd month. he further told me that there is nothing he can do . i told him that i am not happy and i need to speak to a manager or someone in the technical department to at least look at it and try to fix it instead of telling me no. i don't want my money back i just want a replacement for my hair dryer.He the raised his voice and said that he doesn't know me but he is only doing his job and he can't say i'm lying but he knows that the hair dryer fell so its best i just buy a other 1. i explained that the dryer didn't fall and that it doesn't have a single dent or scratch so i need someone to just help me, i can't just let my money go to waste. i asked for his details as i will be reporting him to head office and he laughed and said "with pleasure" and further wrote down his details. i was angry and very much insulted by the gentleman's service. And the way in which he treated me in-front of his staff and customers.He sets no example at all to his staff.