Refusing to close a business account

I am very disappointed in the services that have been receiving from Capitec, infact I have been taken for a fool!!! I fail to understand why after multiple attempts of trying to close a business account it is still active and accumulating interest. I have been holding in calls with the business agents on this process and they have been confirming that the Account will be closed, which is utter nonsense coz it is still active and accumulating a negative balance. This is unacceptable!!!!