Considering they have paid for the bridge about 60 times over and they said the toll would be removed as soon as it was paid for..... there should be no toll!
Crossed the bridge today and Govia don't make it easily understandable. All the signage makes you think you need Govia and can't use other e-Tags (you can!).
If Govia make it hard, sign up with another provider. I have my eTag from Sydney still and use that. All that appears on my statement is the toll and no additional fees (there use to be a fee for a foreign eTag on a toll road).
Toll roads should be standardised to say eTag or manual payment required then a small add for the local provider.