Formal Complaint Regarding Failure to Update Banking Details and Resulting Financial Loss

I am extremely frustrated and disappointed with the handling of my request to update my banking details. I have attempted to change my banking details on four separate occasions. This included updating the details via the app, contacting Old Mutual directly, and submitting all supporting documentation that was requested. Despite my efforts and compliance with your requirements, no action has been taken to update my banking information. As a direct result of Old Mutual's failure to process my request, two months debit orders have not been collected. I now find myself owing amounts that would have been paid had my banking details been updated as instructed. In addition, I have incurred bank charges and unnecessary financial inconvenience because debit orders were presented against an account that I had already advised should no longer be used. It is unacceptable that, despite multiple attempts and follow-ups, my banking details remain unchanged. I have done everything required of me, yet I am now suffering the financial consequences of Old Mutual's failure to action my request. I request that this matter be urgently investigated and that: My banking details be updated immediately. The reason for the failure to process my previous requests be explained. Consideration be given to reimbursing the bank charges and costs incurred as a result of this error. Confirmation be provided on how the outstanding debit orders will be resolved, given that the issue arose due to Old Mutual's failure to update my details. I expect a prompt response and resolution to this matter.