Unsatisfactory service

I stopped using standard bank 9 months ago, then all of a sudden I received a call from their dept collectors telling me that I owe Standard Bank , I then contacted Standard Bank notifying them about this issue , then a few days later I received a call from Standard Bank telling me that they are sorry for the frustration they will pay back the money they said I owe them since it was it's charges then they said I don't owe them anymore. All of a sudden again I got an sms from their dept collectors telling me that I still owe standard bank. Standard Bank doesn't work like other Banks. If they see that your account is inactive they don't just deactivate it , they wanna make sure that you get as many charges as possible then they come and say you owe them. I had an account with Nedbank and also Old mutual this never happened , as soon as they noticed I don't use the accounts they just closed them without any issues. I would not recommend this bank to anyone ( to be honest ).