Impossible to close Home Loan account

We have a homeloan and building indurance with Standard Bank. The loan is paid off and I found a different, cheaper insurance provider so I instructed Standard Bank to close the account. That was in November 2020. I have paid the attorney feed for the deed transfer, paid the fees to close the account, yet Standard Bank continues, every month, to charge account fees. For the past 9 months! It appears impossible to close this account. Do better, Standard Bank, what you are doing here is just not good enough ? and is bordering on theft. You are no longer providing a service, stop charging me for one.