Default Ubislate7C+ Edge, latest Andorid OS upgrade required

I have a Ubislate7c+edge.
I want to upgrade it to enxt android version like 4.2
I contacted ubislate support. they were supposed to send me an upgrade cd or something. I haven`t received it yet.
can somebody help me ?
thanks in advance.

model Ubislate7c+
Android version 4.0.4
Baseband version 1.5_201211
Kernel Version 3.0.8+inet_lzw108@inetsuperserver#38 thus Jan 24 11:22:10 CST 2013
Build Number Ubsilate7c+.20121228.

Development Device IdKG4B-KZDI-A2AN-Y