Old Mutual Superfund withdrawal

I submitted a claim to Old Mutual's Superfund division on the 8th of April. Subsequently SARS declined my application, after which Old Mutual said I need to contact SARS to find out what the reasons were as Old Mutual was unable to give me any specific details. I had a meeting with SARS and they confirmed the fault was with Old Mutual who captured an incorrect date on the application. The issue is I am unable to reach Old Mutual through their call centre, as I am constantly placed on hold and have used exuberant amounts of airtime to try and reach them. I also have no confidence that the issue will be immediately resolved immediately and feel that I am now stuck in a game of "ping pong" between Old Mutual and SARS to resolve this matter. I am now desperate for the matter to be resolved as I have not had any income for 3 months now. My Old Mutual case and reference numbers are Ref: [SF***] - Ref: [CASC***]