No response

On 09/11/15 I bought a Samsung J1 Ace at Foschini. On 11/12/15 the phone overheated & the screen cracked on the inside. I took the phone in and without any explanation on the procedure they had send it away. They kept telling me that I will receive it within a week. On 13/01/2016, zI received the phone in working condition. Only a week later, the same thing happened to the phone. It overheated & the screen cracked from the inside. I took it back and no one talked to me. They send it away & I didn't even sign the claim form. They signed it on my behalf. They said it will take three weeks, but it has been one month & a week already, and with constant calling & going to the store, no one can give me an answer on when I will receive the phone or what the existing status at the insurance is. I need the phone for studies & no one can give me an answer. I am not happy with the service I am receiving &bI am paying for something that I don't have.