I wont help you!!!!

I've been a customer of Telkoms for two years, my contract recently upgraded and the phone was couriered to me. I did not keep the slip of proof of delivery as I felt I would not need it. Firstly I called Telkom customer care twice in one week to inquire about my nano sim card still not working I was only told the third time that Id have to go into a store which I did the next Monday. I have only been using my phone for exactly a week and the screen went black. I went back to the same Telkom and was told by an elderly Indian lady that she just wont help me because I don't have a receipt. She did not even go as far as logging in my details into the system. Now I've worked in retail and I'm not stupid, I know that the phone has a manufacturing defect. I am disgusted with Telkoms lack of professionalism and will be changing providers today.