Standard bank and staff service non existing

I have closed my account in April 2020 last week my son accidentally paid money in to the account the bank accepted the money and made deductions as if the account was active insted of returning the money to his account. I emailed Louis Muzangwa at Standard Bank he said he can't help me. I phoned customer care and they said that they are going to come back to me I have not heard fo them yet.