Automated calls to business line - Won't remove

Standard bank setup a pre-recorded message to come through to a business line, with no information on who needs to call them back. When we call in, they won't divulge who they are looking for and won't remove our number. Calls are coming in every 10min and have been for almost 2 weeks. More then 3 attempts to get this resolved and still nothing. They need the account holder to confirm a change of details, but won't say who that is, and won't disable the notifications due to not being able to get hold of the account holder on their primary cell number.

Completely useless and pointless system, that impacts our business and keeps staff from actually being able to focus on their work, but rather they have to answer calls every 10 minutes.

If anyone at Standard bank who has any authority and logic to rectify, please do!