Bad bad customer service Capitec bank

Honestly my biggest regret ever was taking a home loan with this bank, useless and trash service I called in to mercantile bank 3 months bank to change my debit order day to the 1st which was only honoured once then after that it went back to the 25th, i did this for my own personal reasons but this people failed to see i have been trying to sort this out and so far i been send from pillar to post everyone doesn’t know anything, u finally got to speak to someone today who said they are transferring me to a supervisor to fix the issue only to transfer me to a Lerato who told me she only deals with business banking queries and then put the phone down on my ear. WHAT DO I DO IN THIS CASE? Do i let a bank dictate to my finances? If i can’t get help from customer service then who the hell must I go to?