Hi Drahomira,
I never bothered trying to call them, since they can say anything and then not follow through, that's why I alwaye like having things in writing. Since I never got anywhere with them in writing, I figured calling them would be no different.

The fact that you're having a very hard time finding a valid number for them should be a red flag of the type of company you're dealing with. Companies with excellent customer service like Amazon, give you a million different ways to contact them.

Then use the "chat" or email. Both work perfectly well for me and I am in Australia!