No feedback and a month later I have the same prob

I sent my phone in for repairs in February 2015 after it started over heating and switching off and on. I waited for some kind of feedback but received none. After I complained, my phone was fixed and I was able to collect it the next day. Now, i'm faced with the same problem a month later. It is overheating and switching off and on until the battery dies. I don't expect this from Samsung. Very disappointed. Can someone please get back to me this time with a solution??