Worst service from any bank in SA

I had informed and requested the SB revolving credit loans department that I have closed my current account with them and switched over to another bank.In the meantime until further notice,and until I have my banking details sorted out,I would be making manual payments(ON TIME) at a branch or atm with regards to the monthly instalments owed on my RCL. This is exactly what I had told SB loans dept.But after making the necessary instalment at a branch on Friday,19 June 2015 I woke up to find that today,Monday 22 June 2015 they have debited my account with the amount I have paid already. So I was short that money, which was meant for other beneficiaries.and on top of that, my current bank is probably going to charge me insufficient funds penalties. Something Standard Bank loves to do with customers who do not have sufficient funds in their accounts to cover their existing debit orders. Standard Bank,you are the worst bank in South africa and hope that many customers switch over to a bank that has their interests at heart.Financially you might be a strong service provider,but service and after-sales service wise, you stink!!!