advice needed regrding ATOS appoiutment

Hello

I would be most grateful for some urgent advice

I was sent a ATOS medical questionnaire to fill in and return to ATOS. Unfortunately my doctor whom I have built a strong rapport with and is the one that |I see regularly and has a strong understanding of my medical history has been out of the country in the US. I informed ATOS about this and they asked me to put this into writing which I did so that there could be a delay in me sending the form back as my doctor would need to assist with this and include the details of my medical history.

I did not hear back from ATOS for some time and I called them last week to ask them what was happening as I had heard nothing. They told me that it had gone back into the system which I assumed meant that I would receive a new questionnaire. I have this week received a letter with an appointment for me to attend in the first week of June. As I have not had to attend the ATOS interview last time due to my condition this was decided once they received the information from my doctor. How can I get it back to this stage where I can send in the medical questionnaire as they have not yet had the chance to see this and I feel that the decision of how to proceed should be based on the information supplied in the questionnaire.

Thank you in advance for your help and assistance.