Bank charges before the end of the month

I upgraded to Private Client account beginning of November but I downgraded again to Premier on the 22nd November. The consultant I spoke to said I'll be charged prorated fee for being a private client which I didn't have a problem with. I then asked when will these fees be deducted and she said on the date they're usually deducted which in my case is the end of the month. Today the 22nd I just logged on to my FNB account and gues what? FNB deducted the fees. I then sent a secured message on the app querying about this. The consultant (Luyanda Bonongo) who seemed to have no clue as to why my account was deducted was really not helpful as I had to wait 20+ for him to answer every question I asked. You know I moved from Standard Bank to FNB because of such service. It looks like soon I'll move to Bidvest or ABSA if I'm getting such service from FNB.