FAILURE TO NOTIFY ME OF ACCOUNTS BEING REMOVED OFF MY PROFILE BY FNB

I had the worse experience with FNB on Friday, it felt like I was dealing with a small time Bank , that didn't know what they were doing and this experience left me really anxious about continuing to do banking with FNB. I had 3 different agents assisting on secure Chat as conveniently the chat kept getting disconnected. I acknowledge that Khethiwe Makhubo was the only person who really listened to me and tried to assist and escalated this to the Specialist Team [CAS-***4-K2Q8B9 ] In Feb of 2021 I opened up two Tax=Free savings accounts and had them assigned to my two kids. On Friday I wanted to increase my schedule Transfer amount and only saw one Investment account, I then followed the prompts to make the account visible but it was not there as a hidden account, through Secure chat I then started enquiring after 30 min they still couldn't find the other account; i then went through my past emails and found the two unique account numbers for the two scheduled transfers I have been doing on the 26th of every month. The missing account ending with 7535 belonged to my daughter J Roux, They responded that The account number i gave them for the missing account was under my sons name D Roux; but i clearly informed them that is incorrect as my sons account ended with 4446. i was then informed by Dineo that the account was removed from my profile when D Roux turned 18; problem is I can still see D Roux under my profile and my son is turning 20 next month; the missing account for my daughter J Roux is turning 19 in October, so if one account was delinked without so much as giving me notice then why is my older son still on my profile. Both these accounts are mine that I was saving for my kids, it is not theirs. no now I have an account with a balance of under 30k missing but it is my money that I have been saving, so my accounts gets delinked FNB doesn't bother to give me a heads-up in terms of what's going to happen, yet I am saving up every month in both the accounts. I want both my accounts back on my profile.