Xperia cracked screen- bad service- Melissa Warren

This is my 3rd Xperia Z1 cracked screen report about the poor service and product backup I am receiving from Sony mobile - Melissa Warren. Long and short, my phone screen cracked 15/12/2014 due to over heating. Handed in for repairs 17/12/2014 and after numerous non responsive emails to Melissa Warren, she aventually came back on 09/03/2015 confirming replacement of cell under warranty. Today 23/03/2015, exactly two weeks later I have not heard a word of any correspondence from Sony Mobile's Melissa Warren? This is after I have send her exactly 10 emails. For me personally that has been an huge supporter of the product over the years, my trust and faith has been broken. With this type of \support