Must help us return phones if they have problems

My name is Zinhle Shezi.I bort a phone from pep cell and with in two months the phone stated to give me problems with the network.come on guy how do u expect me to live with out a phone because the network problem is not something I have done that your problemnow I have to live for about a month without a phone.you guy should allow is to bring back the phone and exchange it for another if it has a problem like that.yourl should also take your phones for a test to see the kind of problems buyers will have.am very upset and mad at your.yourl do not with to think about us your only think about the money only.your should just give me a new phone or bring back my money end of story