Transfer of .com.au domains failing despite assurances form source registrar that nothing is impeding transfer

I have attempted to transfer two .com.au (giftitnow.com.au and experienceoz.com.au)domains from Crazy Domains to AWS on 4 seperate occasions from 2 different AWS accounts and cannot get the domains to transfer. The current registrar Crazy Domains insists that there is nothing at their end impeding the transfer but WHOIS does not show any signs of an active transfer in progress and transfer requests just eventually time out. I have transferred other domains from the same Crazy Domains account to the same AWS account and everything has worked as expected but these 2 domains will simply not transfer. Any assistance would be appreciated.