Shocking service due to incompetence

I am writing to formally lodge a complaint regarding a failed debit order that occurred due to what appears to be an administrative error on Discovery Health's part. I contacted Discovery Health in advance to request that my debit order date be changed from the 25th to the 31st of the month, in line with a change to my salary payment date. Despite this request, I have now received an SMS notification advising that a debit order was returned due to insufficient funds — which would not have occurred had my change request been processed correctly and timeously. This is entirely unacceptable. I acted responsibly and proactively by notifying Discovery ahead of time. The failure lies squarely with Discovery's internal processing. It is deeply concerning that the reliance on automated systems appears to be coming at the expense of actual service delivery and client care. I request the following: Confirmation that my debit order date has now been correctly updated to the 31st. Confirmation that no penalty fees, interest, or lapse consequences will be app**** to my policy as a result of this failed debit. A full explanation of how this error occurred and what steps will be taken to prevent a recurrence. I expect a prompt and substantive response to this complaint.