Poor service Private client

Service delivery Private client. I have requested a supervisor to phone me back on the 29th of April 2026. No Response. Now I have been dubble charged for a statement. Because of the call centre that did not stamp the statement. Once again I did phone in today. And asked again to speak to a supervisor. No luck. All the call center agents are working remotely and don't have any contact with a team leader. As a private client I pay a monthly fee. But must wait 3 days for my request to be handeled by the back office. The back office do even phone you to find out what the problem is. Can't complain about service because their is no service