Hi and Welcome to the forum, you might want to have a look at the following FAQ which explain where everything is
Welcome to Benefits and Work We do have some members who live outside the UK but I don't know whether they visit the forum frequently.
Have you tried any of the ex-pat fora?
Meanwhile, have a look at the ESA guide so that you understand the criteria against which you are being measured
ESA claims and appeals If you have further questions, please reply to this message and we will do our best to help. You will find it easily in future if you favourite/bookmark it on your web browser now