Shocking customer service

An IRP 5 was generated for me through Old Mutual that has not been sent through to SARS. SARS is now refusing to let me complete my tax due to this. I have called and emailed a number of times only to be told that Old Mutual will send the IRP 5 to SARS next year and in the interim should I wish to process the IRP 5 I must go to a SARS branch. This is absurd, this is not a personal wish but a requirement from SARS. The minute you question Old Mutual or ask them to escalate the matter they start ignoring you. I really have no idea what to do next.