Clueless staff

I took a loan with FNB, I instructed for the debit order to go off on 30th of each month. I see the debit order went off on the 25th March, I called them this morning, went through the whole authorization process to then tell me to call another department. I then call the other number that was given, ***, which is constantly engaged, I call back to the previous no, and they apologise and gave me another no, *** I then call that number which I have to go through the whole process again just to be told I need to contact another number... this kept going for a half an hour. I then call *** to which im told I am not at the right department and to call again ***. I still haven't gotten to change the debit order, this is incredibly frustrating & *********** of FNB staff. I hope this message to hello peter can assist to changing my debit order and I refuse to pay any bank charges thats incurred.