You can also use Truecallers as a sort of free international phonebook. Just search for the company you want to call, and the app will bring up all the entries made. We found that some didn’t have a number attached, but a flick through the other entries soon turned up one that does. Certainly a lot easier than messing around trying to get contact details from a company website. Even BT, a company that deals in phones, doesn’t make it at all easy actually to phone them.
The only irritation of the app is that it uses ads to make revenue. These are mostly okay, but when you search for a number they pop-up fullscreen on the phone, which is a bit of a hassle.