No computer stuff is ever totally reliable. In an attempt to get this someway BA related - they have been known to cancel flights due to computer failure.
That you've had no connection for a couple of days isn't great, but needs to be considered together with how long you've had broadband for and whether you've had any previous problems. Please don't declare you only got it last week!!!
Work from home and you'll suffer occasional with IT problems. Work in the office and you'll suffer occasional IT problems there. Not to mention the inevitable occasional problems getting to work.