Account safety

How can I secure my account? How can I check if I’m really speaking with Bitvavo? My phone has been stolen. What should I do? Why do I get a notification that my password is breached? How to create a strong password? Is it safe to share my wallet address with others? How can you check your account activity? Why did I receive an unexpected email to confirm a new device? Why did I receive an email about a failed login attempt? What should I do if I suspect a third party has access to my Bitvavo account?