bad services

i bought two phone on the 6/11/2017 at tfg one was bought at exact kerk street in Johannesburg which is a huawei y6 II at R3000 and a Mobicel R6 plus at R3000 at elfo street Foschini, the problem that i have is with the mobicel phone that was bought at Foschini, i was told that the phone they have was the one on display which is the last phone they have, i told them it fine as it the last one they have, i was sold a device that was on display, that everyone that came in the store use it to see the functions with it for the original price that unfair, cause now i own a new second hand phone from foschini at the original of R3000, its not brand new as it have been us by anyone that come in the phone section