MTN benefiaciary deleted by Standard bank

<p>I got an SMS notification that my beneficiary for MTN had been deleted because the incorrect reference was used, but this was the reference I have been using for 21 years. Now I am unable to reload MTN as every reference I use comes back as invalid even though the details are correct as per MTN statements and confirmd with MTN telephonically. Standard Bank has not even given any indication of what the correct reference or format to use is. Just a notification that the beneficiary cannot be loaded as it is incorrect. Nobody at customer can help me. they keep telling me that I am typing something wrong. Surely customer care should be aware of the problem and should be informed on how to fix it.</p>