Disillusioned pensioner

I am recently retired and app**** for my pension fund which has, been administered by NMG. They are the pension admin for the company I worked for. I have had absolutely no joy to date. My email and phone calls for a mere update on where they are in the process has been met with absolute radio silence. I am et concerned as I am a out to fall behind on servicing my debit orders. The fact that they simply don't respond to me at all, is very concerning