FNB Investments Is Very Unhelpful

I have been a customer of FNB for about 30 years. today I called the FNB Investment Division, and spoke to a lady who was very unhelpful. I am wanting to transfer money from my account into an Investment account(unit trusts), so I just wanted to double check that the account number the investor gave me is the correct account number. . So, as a normal person would check, I just wanted to confirm that the account number I was given, is the correct "suspense investment account" number .The woman i spoke to said to me, that I need to physically go into an actual branch, ( with Covid and everything) to go and check the number. So I asked to speak to a manager or a supervisor. She said that she could put me thru to a supervisor or manager, but she is not going to, because what she says, is the way it is. I must just go into a branch. FNB....... do you think that you are doing your customers a favour ,by us opening investments with you? So your staff can be rude to us and unhelpful, and will not put us thru to people who can help us? even though we pay you for these investment transactions. Can you please get somebody to phone me and explain why this person was unhelpful to me.