Mandate Madness, another day in Mzanzi halala

Unsuccessful Mandate:

"Please note a completion error has been identified. This means that you are unable to complete the mandate with the information provided and the transaction has been cancelled. Please contact your overseas sender to check the bank account information provided for pay-out. The pay-out bank account details must match with your bank account exactly i.e. as per your Bank Account Confirmation Letter as this is needed for the mandate form completion. Please note that we are unable to amend these details. It can only be amended by the overseas sender who placed this transaction to you."

I've been using the same information, the same payment service, for 2 years. Until now, no problems. I haven't changed A SINGLE PIECE OF INFORMATION, so I don't understand where the error comes from. Where is my money? Who knows. Does Bidvest care? Not enough to fix the problem, and I see now that so many people have the same problem.