How did you get on with retrieving the information that I suggested in my original post?
If you have not been able to make the requests or the information shows that they had the correct address, or that there were no problems with the post in your area, then you have to considered the likelihood of you winning an appeal which could take several months to be heard.
There is no waiting period for you to make a new claim for PIP.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems