Old Mutual - no action, no response

I have been trying to get Old Mutual to send me a tax certificate, to no avail. Numerous phone calls and emails - still nothing. The Old Mutual tax mail (***) even reply with this: The recipient's mailbox is full and can't accept messages now. Please try resending this message later, or contact the recipient directly. Really? Mailbox full? And the client must accept that and deal with the wrath of SARS for late submission? Unfortunately, judging from entries on Hello Peter, I am not the only one with this exact problem.