Terrible and *********** service from Nedbank.

I have been a Nedbank client for almost 30 years. After recently retiring, I decided to downgrade my banking package. Since May, the new monthly fees I have to pay have been incorrect. I have complained numerous times via direct phone calls to Nedbank and emails to my personal banker. Direct calls helped nothing as I was always referred back to the personal banker. She eventually responded to my mails once I threatened to go to social media. Twice now the incorrect charges have been corrected just for it to be incorrectly take off my account today once again. I give up now as I don't know who to ask for assistance any more.