Hacking problem

Hello, my ex logged into my gmail account a while back. She had my password. I've since changed the password but have also had my Facebook logged into from Croatia....her home country. I've changed this password and the language settings too but I was still getting some notifications and other parts of Facebook coming through in Croatian. Sometimes in English. The browser versions of Facebook I logged into my account from were fully in Croatian. I'm fairly sure I've resolved the Facebook issue but I still get adverts on my android phone in Croatian. Despite uninstalling and then reinstalling the apps it seems to affect. Any ideas to stop this please?