Contacting PIP

Does anybody have an email address for PIP? I submitted my review for using Post Office collections Services. This was over 3 months ago. I have not heard anything from them yet and I have a condition that makes telephone calls, almost impossible. I included the evidence from Capata (my medical) with a note saying that I believe this is the best evidence. nobody can go against their own evidence! if you feel it will help then include it. In my case, I feel they underestimated my abilities but hopefully they will, on assessment, get it right