It has happened to allot of people. Plarium does not  care. 

Here is the answer I got when I sent a ticket. 

Hello,

Please note that email and social network security is the sole responsibility of the account holder. Furthermore, Plarium claims no responsibility or liability for any losses or damages incurred as a result of third-party security lapses.

We would like to tell you that we have created an article concerning "hack" complaints. You can find more information concerning "hack" requests here: https://plariumsupport.zendesk.com/hc/articles/115002487085

As we have provided you with the complete information regarding this case in our response, we consider the ticket as "closed".

Thank you for your understanding.

Valeriy

Customer Support Team