Account overpaid

Phoned account queries. Asked Noncokozow Why I haven't received a statement since 1/6/2017. She advised that they don't send statements. Asked her what my settlement balance was. I asked her why my account was debited with R498.00 when my balance was R246.65. She told me I must query it with the debit department. I told her that it's not my job. I demanded that the money be paid into my account by Monday or I'll take this mater further. She put he phone down in my ear. I phoned back and told Thokozani what happened. He told me to go to my bank and cancel the debit order. I told him that I don't have the time to do that and I don't see why I must pay the bank. Charges for their mistake. He promised to get back to me by the end of the day.to date I haven't heard from him. I settled my account before the contract period and this is the service I got. One of my other debits were returned as their wasn't sufficient funds in my account due to them drawing extra money from my account. I thought I did them a favour by settling my account before the time but they made my life miserable and spoilt my credit record