complaint about account closure

I paid up my account, last debit was end of August. I am now surprised when I get calls from the collections department advising me of an outstanding amount of R421 yet I called the customer service department twice and got confirmation that I am charged in error and it should be sorted by the 16th of October 2024.

When I advise the collections department of this they tell me they don`t have access to see customer service history notes on my profile and they do not communicate with them.