Standard bank charges me banking fees for ********** transactions

I called standard bank to let them know that my cellphone has been ******, and the person who stole it is using my cellphone banking to buy airtime, they told that they would block my card and deactivate cellphone banking. Days later I found out that cellphone banking was not deactivated and the person who stole my phone was still using it to buy airtime, they bought R780 airtime. Now Standard Bank is charging me banking fees even though they know that my phone was ******, and if they had deactivated my cellphone banking as I asked them to do so, that person would have not bought a further R500 airtime. Standard Bank was just negligent.