debit order not cancelled after successful request

i went to FNB to cancel debit order NSFAS, due to the i reported case which FNB very much aware of . a consultant told me to use my phone to cancel debit order from my phone which i did . it was successful , to my surprise NSFAS debit order went out this morning meaning that it s no longer safe to bank with FNB,coming to think that i have put all my eggs in one basket which is FNB( business accounts, kids accounts, loan , car , funeral polices you name it ) am afraid am no longer safe at FNB . can that be sorted out or i start looking for another bank