The wait has become TOO long

I left a company I was working for on 26 Oct 15, I called Old Mutual mid November to find out when my pension pay withdrawal would be paid, I was told that the paper work was only sent to them on 11 Nov 15, so I was told the wait would be longer. I then called Old Mutual again on 21 Dec 15 to which I spoke to Siphokazi, who first said I didn't have funds in my account and after insisting that I did infact have funds and this was confirmed previously, she then she said I did have them and they only received docs on 16 Nov 15 and a simple stamp was missing so they couldn't pay. I asked that since the 11th/16th of Nov NO ONE COULD PICK UP THAT A STAMP WAS MISSING despite the fact that I called and no one told me this, she said I should have the docs stamped at sent back, so she would escalate it to the manager so the payment would be done that week which was within the 6 weeks. It's now the 5th of Jan more then 2 months later and nothing has been paid or communicated to me. I've followed up via mail to which she will ALWAYS sends me the same email, which says nothing at all. I need this cash to be paid to me as a matter of urgency, which Old Mutual Staff do not seem to respect at all