Over charging of fees

My name is Raymond mathopa using a student achievers' account and on the 26 of January,I reversed only 1 debit order in my bank of Telkom due to Telkom debited my bank an amount that was not Authorized and told about. On the 15 of February standard bank charged me for failed debit order R115 and it was charged twice which there was only 1 debit order reversed and not failed