Without my permission scratched in my account making deductions

In the month of August 2024 there was a R2000.00 recovery deducted from my check account. I've been calling standard bank asking what does this pertain to and who gave authentication and permission for this. No agent contacted me back. I feel that my money is not safe with standard bank, how can they process deduction/ recoveries from my account without my permission. Should someone not contact me in the next two days, I'm moving my salary including my home loan to Capitec Bank. After banking with them for almost 20 years. This is unacceptable.