Claim of Provident fund

I've resigned from my Employer on 28 November 2014. I immediately conducted all the needed documents in order for Old mutual to make a withdrawal. I was promised it will take up to 6 weeks for the payment to be made. After the 6 weeks, realising no payment was made.l received a message stating my bank details are WRONG.Once again, Iv'e send all the required documents, which I followed up with the call centre on a daily basis,stating everything is UNDER CONTROL. Two weeks a go I was told my claim is with the assessors and it may take up to 10 days for payment to be made, now I've been informed that my ID number is WRONG so they couldn't make the payment.I'm tired of this bad service,and broken promises of a 'trusted company' . So I would kindly request to take this matter seriously.And that the payment will be made in three days.