Debit Order Complain

I went to fnb branch in braamfontein to try and reverse same debit order that went off my account twice. i was advised to do it on the App which i did on the 28th September. I didnt get any call or assisted with my issue until i went back on the 02nd. only to be put on hold for 50 minutes and i decided to ask for a branch manager to assist. she told me that she sent an email to that specific department and will get back to me. Today is Monday 05th no one contacted me and i went back to find out. That lady wasnt there and someone who i believe is the assistant told to go query with Nedbank after so many days been coming there. Their service is so pathetic and i am changing to another bank.