Posted: 11/01/2013 at 04:47
Oh Bill, you have had some problems and from the thread I see others have, too, but have offered some really good suggestions for you. Stand back and take your time to think things out and then gradually decide - let's be honest it is not life threatening and will be enjoyable eventually 
When I moved into my new home about a year ago there was (was being the operative word) a huge bay tree taking up a lot of space and casting a huge shadow on the flower bed below. I eventually got a chap to come in and remove it but like you he left the huge base and miles of underground roots! With much patience on my part he eventually came back and has dug more or less everything up and made a very big hole. I have dug it over several times removing yards/metres of roots as I did so - satisfying in its way to boot. Am planning on plants with pots in the newly created space and low lying ground cover.
Don't be discouraged as gardening can be fun, is very rewarding and therapeutic 