Bad Services, no feedback, no action!

I submitted my Provident Fund claim at the beginning of August 2015. Old Mutual only wanted to pay out my monies due from March 2015 until July 2015 as they said I was only a contributing member from then. My employer extracted a report from Old Mutual online system confirming that I have been a contributing member from November 2013 to the Orion and Super Fund. I have been waiting for feedback to be settle this query to ensure the correct amount gets paid to me. No matter how many emails are sent or called still no help. The call centers can't assist and the administrators won't. Turn around time is suppose to be 6 - 8 weeks, what must I do to get any feedback? Escalated to Superiors but all they mail to administrator is please assist but no assistance is given. What should a person do to be helped and given assistance????