No response. Problematic phone continues

I contacted Sony Mobile via Hello Peter after several attempts to have my phone fix with software updates and after it was sent for 6 weeks repairs. <br> On the 22nd of May 2015 Melissa Warren contacted me. She asked for my details, and after I rep**** with all information she requested, she said she requested full details from Sony's repair centre and will contact me back. One month later I still waited for a response and contacted her again. <br> She did not even respond to my email.<br> Now I have a faulty phone since February when I received it that continues to crash/freeze daily. Sometimes refuse to charge, or the battery will drain in a matter of hours. And no Sony Mobile, it is not a app that drains to power, when that happens, the phone misbehave and are sluggish. Totally unprofessional service.