Bought 2 phones from pep doesn't work

<p> Hi there. I bought my 1st ohone at pep 25/03/2016 it was mobicell go plus after 2 months it stoped working them same day I took for repairs and I bought another 1 cell c bravo I have slip for both, after 2 or 3 weeks the 1st phone mobicell came back but when I checked it wasn't working I send it again till to date never recieve a call or anything about it its more then 1 month. now my second 1 also giving me trouble and I want to take back also. This is utterly poor service and my money has been waisted I need help. </p>