Phone just keep on switching off

I am very disappointed with Samsung, I just bought Samsung galaxy grand neo two week ago at Jet store in Sandton.<br> It keeps on switching off, I have to open it remove the battery and put it back in for it to switch on again.<br> Yesterday alone it switches off 6 times. I love my phone but is really stressing me as I spend a lot of money on something that I thought I will enjoy using. I am really taking a good care of it and now this.<br> Now I am so frustrated, and very disappointment. <br>