Cancelling My Account

I'm extremely appalled and tired of the way standard bank branches deal with their customers, the customer service they provide is just terrible and to think this is the second time I've had such an encounter in a standard bank branch makes me compelled to cancel my account with them. Gateway Branch just refused to assist me reverse a debit order. Saying I have to go to enquiries, the last time I was there they were able to do it for me without going to enquiries. And now they tell me it was an exception. That's *******!