Complain

I bought a phone on the 2nd of January this year. On the 12th the phone lost the network. I thought maybe it was because I put in a different sim card then I changed it back to vodacom but still the phone had no network. I then went back to the shop the lady at the till referred me to the manager that told me to bring all the things that came with the phone. I told the manager I left the earphones @ home by mistake and I can only be able to get them during Good Friday n she told me she won't take the phone then. I mean I brought the phone to fix network problem not anything else. Had to buy another phone because they refused to take the other one. Now m here with non working phone while I paid R1099 for the phone n refusing. M really not happy about this I just wish they could take this phone, fix it n return it back to me or give me my money back because I can't pay this money n use the phone for only 11days.