You can email Atos Healthcare Customer Relations
I never use the phone as there is no paper trail that may be used in any future legal action in the High Court. I have used this email address for changing appointments, complaints, appeals etc. I do sent a first class letter each time.
It is very likely that you will receive an email reply which contains a phrase such as: "I am afraid the Customer Relations Team are unable to cancel an appointment on your behalf...". For a firm that boasts IT skills it is very reluctant to rely on its own IT. Maybe this is a sales opportunity for one of the other big five IT services firms in Europe to sell a computer scheduling application to Atos Healthcare.
You can then email them again:
"I would like to formally complain that you have taken no action on my request in my email dated .... to cancel the appointment scheduled for ... In line with your "Caring About Customer Service" I expect within "2 working days" a letter acknowledging my complaint and a full response to my complaint within 20 working days. Please ensure my allowances are paid in full while this matter is being considered and ensure that no further appointments are scheduled."
It is likely that you will not receive a reply so after two days email again:
"I would like to formally complain that ....".
You will get the appointment letter to phone and another one which sets the appointment date and time and perhaps another one and perhaps another one. Complain as above to each one.
First you will be dealt with by a Customer Relations Manager. Eventually you request your complaint to be dealt with by "The Independent Tier". This is refused.
You will then be dealt with by the Team Leader, Customer Relations who will always claim there are new matters to be reviewed and as such it is too early for the matter to be reviewed by "The Independent Tier". Eventually you request your complaint to be dealt with by "The Independent Tier". This is repeatedly refused.
Remember you are not allowed to complain through the DWP procedure and a legally appointed tribunal until you have exhausted the Atos Healthcare complaints procedure or die in the attempt.
You will then be dealt with by the Senior Medical Advisor. This is as far as I have got so far (it is coming up to six months).... Now at the end of November 2009, at long last, I have received my medical report. Use the link at the top of this page to read the report. You can judge for yourself whether the DWP or Atos Healthcare had something to hide. I believe it was the personal intervention of the Secretary of State that allowed my medical report to be released to me.