FNB - worst banking provider ( premier fusion)

I am so upset. I got convinced to go over to a premier fusion account. I did so. activated my card yesterday. and just watched my negative balance grow even though i had funds in my account. they are *******. I tried going into the bank but the lady who was helping me was so rude!!! She would not change my account back to a premier cheque account! She did not even bother to listen to look on my banking app or even try assist me or help figure out what was going on! I just opened a business account aswel. I will be cancelling that as well as my premier fusion . My boyfriend will also be cancelling his accounts and business account as your service is shocking!