Reporting Sat Nav GPS mapping errors for Sync2

[murcod]

Does anyone know if there's a way to report mapping errors with the Sync2 maps? I've got the latest version but they've stuffed up the street numbers on a major road in an inner city suburb in Adelaide. You try and enter the street number and Sync2 says that number doesn't exist.

This is the address I tried , from memory it gave me an option from 172 up- so I'm guessing that entire block on Fullarton Rd Dulwich isn't recognised (from 162 to 171.)

Sygic on my phone does recognise the address. So does Google Maps. Whereis appears to show it, but actually labels 174 as 164 (compare it to Google Maps!)