***** in my FNB bank acc

Reference "Decline foreign T..." debited from my bank acc a number of times. I can see 25/01/23 - R8.50, 25/11/22 - R8.50, 8/11/22 - R8.50 & R8.50 = R17.00. I suspect there has been these transactions before debited from my bank acc. I would like this to be investigated and my money (though little) returned back into my bank acc.