Know your rights!
Some brief advice on the process of appealing a failed Work Capability Assessment (WCA), as well as some signposting to relevant advice bodies who may be able to assist you.
When you first receive the results of your ATOS WCA and it is a fail, the first thing that many do, as they are panicked and desperate, as they have had their money stopped, is to panic and phone the Job Centre Plus and ask about signing on for Jobseekers Allowance, which is what they want you to do, but there is an alternative and that is by asking for a reconsideration and/or appeal.
How to request reconsideration/appeal