Yakim,
I think that all of my correspondence with Mirex was via email and fax. I bought mine in September 2007, so it's been a while, but I recall that it often took them some time to respond to my emails. I'll check when I get home this evening to see if they supplied a phone number that might be different from what you have. On second thought, I had an email meltdown last year, and so the Mirex stuff might be gone, but I'll have a look anyway. As for dialing EU phone numbers, whatever works is what's required. I sometimes think that it's not as systematic as it should be. From Canada, I'd try 011 49 and the rest, and then I'd add the zero for the second try, if it didn't work the first time without it. Have you tried the fax number on voice phone ? If it squeals at you, then you could sent it a fax.
Jim