Account closure

I have called FNB bank to cancel my account completely as i have moved to discovery bank,i keep on hearing different stories each time.i would like to cancel my premier account with immediate effect,i really dont understand how it could take a month from the day the request was made.i have called fnb again recently and the lady i spoke to said that she has logged an instruction for cancellation,three days after no call ,account still active. Can someone please close this account