No assistance from Old Mutual since beginning July 2019

I have no been struggling over a month for Old Mutual to correct my IRP5 which relates to funds I withdrew from the Old Mutual Superfund. The IRP 5 was incorrectly done and states that I withdrew the full amount which is not the case as per the tax directive issued. This now results in me owing an amount to Sars which is not the case. The best way to fix this is to adjust the IRP 5 but I have not been able to resolve this since the fist week of July 2019. I have been promised that this has been escalated but no feedback. I have called numerous time to no avail????????