If you need it fixed go and see Adam at Alberts Cannington ive had 2 cars kitted out with them now and Simmo the Installer is a top bloke and knows his stuff just take a look at there demo car and Petes car all top work, tell em Phil from Harvey Norman sent you and they should help out on any cableing (sp) that is needed too.....
If not just mention dept of consumer affairs to Osbourne Park and they will fix it asap

just my 2c