When i try to create a post by importing a word file I lose all the formating information . (I never had that problem before)
And when I ty to use the “new post” feature it dioens’t work at all. I can’t save or publish te information
We can’t help you without a link to the blog, starting with http. The answer depends on the blog. Also, don’t EVER use the New Post button on the admin bar. It’s buggy. Use Dashboard->Posts->New Post until the button is fixed.
WordPress.com is constantly changing, and Word has never been web compliant. If you want to retain formatting but write offline, use something specially designed for that. I recommend Windows Live Writer, which works much the same as Word except it is web compliant, and you can add tags, categories, and images.