FNB deducted funds in my account

I opened a share investor account some time ago. I have since stopped using the account. This morning I receive and SMS saying there is a transfer from my transactional account into that account.<br> I got a number of issues with this.<br> 1. When I opened the account I never authorized FNB or gave them a right to transact on my behalf<br> 2. FNB clearly does not respect my account as a customer, why must they fund an account that belongs to me on my behalf? Why not close it if they think am not using or funding it?<br> 3. What document did I sign that says in the even that the share investor is overdrawn FNB reserves the right to do as they please with my money, like taking funds I have budgeted for to fund the account.<br> 4. The share investor account is overdrawn with 632 but FNB went and deducted 832 in my account? Not that am okay with the deduction, but what the hell really?<br> Am so disgusted with this that am considering closing my account or just move to other banks.