See the FAQ in Spotlights on claiming ESA In FAQ Spotlights HERE
Scroll down to Employment Support Allowance.
If that doesn't help, post again and hopefully a moderator with more ESA experience can help. Being retired, I now only deal with DLA/AA and appeals.
PLEASE READ THE SPOTLIGHTS AREA OF THE FORUM REGULARLY, OTHERWISE YOU MAY MISS OUT ON IMPORTANT INFORMATION.Nothing on this board constitutes legal advice - always consult a professional about specific problems