Real bad customer service

I bought a cell phone at Pep Cell on Saturday the 21 November 2015. We tested it on Sunday and on Monday the phone started giving issues with the touch screen. At first i thought maybe it was the screen cover so i removed it and tried again and everytime i tried to unlock the phone using the pattern lock, it didnt want to unlock and the pattern was being drawn properly. then the phone battery died within a day with no usage and the phone wouldnt go into sleep mode. i then took the phone in on the 24 november 2015 and the manager informed that they cannot refund or exchange for another phone. She said she will speak to the regional manager and call me on the 25 november 2015 at 9. Today i waited until 10:30 and then i decided to phone only to be told that they wont change the phone because there is nothing wrong with it, so now im a **** dont know why i took the phone in. Advice dont buy from Pep Cell very weak customer service and you will lose you hard earned money.