Bad service from consultant

I went to vangate mall cape town yesterday spoke to a consultant she told me to bring a bank statement if I want to change my banking details I went to with great difficulty went back to the shop got back to the same women she asked me my old bank statement too but yet she only said statement. Then after I asked her then can you assist me she stated she will try and change my bank details I was under the impression she actually did she sent me to nedbank well told me to pay it there because Woolworths apparently to her Takes 7 days to reflect this morning I went to promenade cell c shop the women told me that it doesnt take 7 days and also I can pay it by Woolworths so if shes so welcoming with assisting why did the other consultant bull**** me !!!