3 months and still no result from Mutual & Federal

My car was bumped by a client of Mutual and Federal on the 6th August 2015. Their client accepted full responsibility and liability, and encouraged me to put in a third party claim for damages, which I did. <br> <br> It is now well over three months since the accident, and I still don't have a resolution from Mutual and Federal. It took 1 month for them to assign an assessor to view the car. They took a view on the pre-accident condition of the vehicle without any input from myself the owner. I challenged their decision, and was eventually put directly in touch with the assessor who agreed with my view and instructed them to review the settlement amount. We are now well outside their 60-day deadline to resolve claims, but this doesn't seem to trouble them. My e-mails remain unanswered, and my claim unresolved. <br> Their disregard for me as a third party claimant is awful - ironic for a company that has as its twitter handle #MFCares and its brand logic: \care is at the heart of everything we do". I would appreciate any help I can get in resolving this claim. It frustrates me that I have done nothing wrong"