Problems logging in to my Meteor account.

I've been having problems during the week when trying to log in to my account to use webtexts on their site.Kept putting in my number and pin (which I haven't changed) and a few times it said it was incorrect.Got on to it then on another computer and sometimes it would log in fine but sometimes not.

Was grand then up until recently,when today I went to log in and something popped up from Google chrome saying that it doesn't recognise the security certificate and it could be an attacker or something.This also happened when I tried on firefox when having my original problems.Has this happened with anyone else?Haven't got around to contacting Meteor yet.