Dysfunctional administrative system

I have closed and settled my account during 2021. They have subsequently added in excess of R300 to my account after closure and I am plagued with collection calls. Tried numerous times to get through to the collection department who eventually told me that I've also had to cancel my account protector. The fees were loaded for the protection of an account that does not exist anymore and I have never been informed by the staff member in the branch of this. The operator at collections were going to transfer me to cancellation department and I was conveniently cut-off. Very poor service Edgars........