If you are on the correct map and you're looking at the right coordinates, the haven should be there. What are the coords and the name of your main? Feel free to message me if you don't want to answer here.

Thanks Crowbar for your help.

Here’s the official reply I received from Plarium Support, in case anyone else encounters the same issue

"It seems that your main account is located on the Facebook – Pirate Bay server.

Unfortunately, for technical reasons, it’s impossible to create a new account on a Facebook server or to transfer your progress to Facebook servers. Therefore, you won’t be able to access your main account from the new one you created on the Plarium International server"

Hope this helps anyone who runs into the same problem.  

@Rosario Runza, thank you for the update. As suspected, it is a matter of the wrong map, although I admit forgetting that FB maps still exist. They have been closed off for new accounts for a couple of years now.

thanks