@sb1 we apologise for the any inconvenience that this has caused you. The loosing providers are not allowed to block any porting request from any gaining provider for as long as the gaining provider is able to provide the required information.
Please see https://www.acma.gov.au/Citizen/Phones/Numbers/Keeping-your-number/mobile-number-portability-faq#One
15. Can my number be ported without my permission?
Only the account holder, or authorised representative, of a mobile service can authorise a port. The new provider is required to verify that the person requesting the port is authorised to do so before processing a port request.
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