Poor Client Service

I went to Nedbank Dwarsloop for a form to be signed as I have to submit it at school, I don't have an Account there but they need the Stamp from the bank, The lady Called Precious said she won't stamp my form as I don't have an account there, I said to her I know I've been doing those for 3 years now, she sais she's been working there for 10 yrs she has never done that, I should wait for the manager to assist me, I waited for 20Minutes, I explained to the manager what I want, The Manager Zandi called her and asked her why not stamp this form, Precious said she can't sign the form nor stamp it cause I said don't an account with them, Zandi said assist the client she refused to help me, she didn't even bother check for me, she claimed system has no network until another lady check for me, Precious Shubane went to Zandi to tell her no account she refused to stamp it, Zandi Helped me, Precious is even rude to her Subordinate, Doesn't take instructions, may she be taught Customer Service, even if want open an Account there won't go due too bad service I got, Zandi the manager was so helpful and apologized on her behalf. Precious Shubane must be taught how to treat client