Faulty New Cell Phone

I bought a Samsung grand neo phone cash on the 22/02/2015 and used it for 1 day & discovered that it had a camera faild error even after reserting & was constantly freezing, took the phone back to the store on the 24/02/2015 they took the phone & told me they will take it to be checked before they can exchange it & give me feedback on 27/02/2015 when i didnt get feed back i went to the store on 28/02/2015 to check & i was told the phone hasnt gone for repairs yet, they will look into it & get back to me on 03/03/2015, i ddnt get feedback so i went to the store again today 04/03/2015 & i was told again that the phone is still in the shop, now its been 2 weeks i bought phone for R3000 but i dont have a phone currently & im quite sure wen i go again on sataday i will be told to wait another week. After this incident im going through right now i will never buy any devices from markhams il stick to the clothes only.