Policy Keeps on Attempting a debit after change of bank details

I went to the branch to change my banking details in March 2022. The debit order was sent through to the previous bank account which left me encountering charges. I sent a complaint to their department. Nicole Jacobs from the complaints department requested for the date and the bank statement and i never heard from this person after that. Just last night after a month, they a=send another attempt of a policy that i don't have with them anymore, which left me again with additional bank charges. I need a refund of all my bank charges ASAP.