Poor service from Pep store

Hi On the 31 of January i bought a phone in one of your stores at Giyani. The handset is An Etell a12 .the phone only worked for a month and completely stoped working it fails to read my simcard .i took my phone back the shop. consultant who was helping me took the phone back and said i must come back to check it after two weeks i spent almost 60 rand to travel there and they told me the phobe is not back and no valid reason given .i asked for refund or a new phone i was told there was nothing they can do . I feel like the communication is so bad.i was told again to come back after 4 weeks i went there after 5 weeks i was told my phone is not back . I dont know what to do i spend money to Giyani and im not being helped . Why is the service so poor.. i wish someone can just contact me and explain to me what is going to happen because consultant are not being helpful. Pls help .