Service providers treated below average at discovery

I'm a medical doctor, service provider, at discovery insurance. I have been trying to change the Banking details for the last 1 month and followed exactly right instructions by discovery but despite of my several attempts the banking details are not updated on the system. I can only think of negligence by discovery as his attention is only to attract the clients by advertising attractive ads but service provider are badly neglected. I'm forced to take help of hello Peter as it might wake discovery up from slumber....