Phone not working

Good day <br> I took out a contract with your company September this year. My phone started giving problems today, it just switched off by itself and I'm unable to switch it on again. I tried charging it, but the problem seems to remain.<br> I called you call centre, and no one is assisting me.<br> You won't be able to contact me on my phone due to the nature of the problem, please email me on [Email Removed]<br> <br> Cell number in question ***<br> Phone make and Model: Samsung S6<br>