Debit orders I don't know

Hi I keep getting this messages that I don't know or don't remember when I actually accepted their Terms and Conditions. The message is as follows: FNB:-) R23.86 paid from Easy Account...@ Feds Fxfedzbd Txn Fxfedzbd Txn. Avail R59. Ref.Fx Ibice00260 Sd3grj. 14Dec 10:46. How do I stop them?

Best Regards Ayanda