Does the report say the name of the officer who reported you? If so, go to the station and ask if you can talk to them, or organise a time to speak to them....
Then say "This report says that I was here at 2:22pm, is it possible that you've gotten the time wrong, because I wasn't even in this part of melbourne at the time." He'll of course say "No, that is correct, I spotted you at 2:22pm at xxxxxxx", reading back the details of the first report.
Boom, conflicting information, and a bullshit "amendment" from EPA...
Will be enough to get it cancelled.