I moved your post to it's own thread as it is unrelated to the other topic.
Can you be a bit more specific? What is the issue you are having with private messages? Are you on a mobile device using an app or are you using a web browser?
There is a link in the top right if you are on a regular web browser that says "private messages". You can access the PM system there. If you are on an app, there is a tab at the bottom that says private messages.