How to delete bank details for GDPR

Summary:

Hi, Has anyone managed to find a way to delete bank delete bank details once they have been processed for GDPR?

Content (required):

I am unable to do it using HDL and also manually as it says the bank details have been used. They are already end dated, but need to remove from the system.

Oracle support saying it is not possible. Obviously this is data breach if we cannot sort it.

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