I am absolutely shocked to hear this. The Austrian UPS doesn't trust the Canadian UPS? It's not an issue of personal trust; they should shut up and do their job. I would try calling UPS and asking them what the hell they are up to (maybe not using that exact choice of words...).
I'm really sorry to hear about your troubles. I've the three big shipping companies (UPS, FedEx, and DHL) quite a few times and had both good and bad experiences with them all. Not a big fan of either one, though I do generally prefer UPS. I've never had troubles like this, though.
the most ridiculous point in all of this that even Canadian UPS support cannot do anything from their side either, keeping redirecting to the UPS store that sent the packet.
the most funny thing is that the UPS store keeps sending emails to the UPS office in Austria asking them to call 1-800 toll free number! Their ignorance is just unbelievable!