Terrible service from private banker

It is an absolute nightmare to get assistance from my private banker.Several calls made no answer,msgs sent some don't get answered unless you follow up if they do get answered it's hours later.Please cancel our joint private client account (for both my husband and I).I sent my private banker an email 5 days ago till now no response.Tried to call her no answer no courtesy of calling back to understand assistance required.When I got my car financed in Feb I struggled just as much.