I had this, so frustrating. When they moved the payment platform from MYOB to Stripe, the direct debits were not set up as they had been previously.
I work for two companies and had issues with both.
For one, Stripe had me set up as a signatory because I was the administrator on the MYOB account, but I was not a signatory on the bank account. A grumpy email telling them what they had done sorted it out, but not after a bounced payment.
The second company required two signatories, but there was only one signatory on the email I received. I contacted MYOB immediately, but they ignored the issue. The direct debit did not go through, and this somehow became my problem. We had a dishonour fee as well, and I was asked not to stop the payment. I hadn't, of course, but a second signatory was required to be added. I had two cases going with no replies at all. After a really angry phone call, it got sorted and paid.
But so frustrating and a complete waste of time.