Trying to close account which is not used

I experienced terrible service from standard bank thus I moved to fnb. I was contacted by Standard bank representative who asked me to keep the account open. I tried to maintain relations due to existing loans I have open with standard bank. I have been incurring extra expenses on this open account which is not warranted. I went into the bank to close the account and it was not , I tried on 2 different occasions. It was said that I should pay R300 and then it will be closed, I paid the cash and then the account was not closed and now I am asked to pay another R200 to close an account. And this is not for the monthly account fees, this is for debits which I previously cancelled.