Settled account

Hi Wonga Team.. I have settled my account last week and send a mail to customer service to inform them and to cancel ky debit order because of my account being settled, they rep**** back but not even helping me, uust referring me to a call center,which I did and still they didn't cancel my debit order,it still shows on my bank app..please advise on this one, as customer service weren't much of a help.