Declined Foreign T457 - FNB ****???

I received sms notifications saying my son's account linked to mine was overdrawn. To make an immediate deposit or legal action would be taken so month after month I was transferring money to bring his account out of the minus. Apon further investigation I discovered countless transactions saying declined foreign T 457 for R8,50. Now today my own personal account has started with this transaction saying declined foreign T 457. Doing more research online I've discovered numerous complaints and reviews against FNB about this transaction. I have no cooking clue what the hell is going on with my account. Being at home now with lockdown and not spending any money but getting these transactions coming off for what? Its outrageous and unfair FNB. How dare you! People work hard for their money only to be ******. I thought FNB was the best up until now. Seems I should rather go back to Standard bank and cut my losses with FNB.