Old Mutual Claims department unresponsive and inefficient

I have resigned from my company in September and have decided to withdraw my funds from the Old Mutual retirement fund. After 6 weeks of waiting they claim that the company have not send them the necessary documentation, even though I have proof that they have. Then on calling their call centre the person I spoke to couldnt help but promised to get someone to call me back the following day....which didnt happen. On calling them again....because they dont return calls as promised, I held for 20minutes without being helped. According to their voice recording you can send them an sms to which they will respond immediately. Howerver they do not tell you what information they need in the sms in order to respond...so I sms'ed them my reference number....needless to say I have not received any response. Really badly done Old Mutual