Is there any way you can get on a desktop or laptop, or some sort of internet cafe? I hate mobile web, lol. I'm used to having a nice big screen.
To PM in chat (you both have to be online) type this: /pm username message
For example, /pm Kikuyo Hi! How are you?
Remember the forward-slash, / , and check the spelling of the username you wish to contact, because if the whole code isn't entered correctly the whole chat can see it.
To mail someone, go to their profile. There are tabs across the top of the page, and tabs on that profile. Use those tabs, and select mail. Then send your message.