AMP Australia Post Shipping

We use this app for shipping integration with Australia Post, but also for managing free ship thresholds. We cannot access the data in the app, every change needs to go through their support team. We have made a decision to increase charges with upcoming post rate increases - 3 WEEKS LATER we are still waiting for a response from their support team. Being unable to implement a change ourselves, and having no support means we are now actively looking for an alternative - not the job you want a week out from year end. Very disappointing - service has progressively worsened since AMP bought this app from the original developer.