Appalling customer service

I went in on 11 Jan to get signing power on my dad account. I could not be assisted on the same day had to make an appointment. Then came back on 19 Jan was sent to enquiries to do a signing power. The consultant on counter 10 had no base badge. She then gave me reasons why I should not get the signing power . After insisting on proceeding she started. I was then told only one person can have the app on the accounts. Real culture shock cos if I am getting signing power surely these account will appear on my profile and I can have the app on my profile . I have this with my Bank. Instead of the consultant providing solutions she became defensive stating she just works here and I can raise this with the complaints department. She then called her supervisor who starts speaking to me in a loud voice as though I have a hearing disability. I just ask her why is such a lengthy process done at the enquiries counter where the customer has you stand whilst doing a transaction in excess if an hour. This supervisor I think it was Susheta or something like that in her loud voice tells me if I had a personal banker then they could have done this for me. Whilst assisting me this consultant has a chat with her colleagues. Am absolutely horrid and appalling experience ,customers service us obviously not a top priority.