Hi Zoey
I'm sorry you find yourself in this position. You are certainly not the only person to have had a DWP response that implies you are exaggerating your symptoms. You could put in a complaint about the wording of their response, but until the Tribunal is completed, you're unlikely to get a resolution. As hard as it is, the important thing is to look over the papers and make sure that you're ready to fight your case and are able to rebut what the DWP has said.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems