ABSA shy about telling customers interest rates

Why can the support desk not give me the current interest rate for a fund, specifically the Cash Invest Tracker? Surely one does not have to open an account first? The circumstances were that I was enquiring about my mother's account, which had been transferred from the Money Market Fund. Support said my mother had to be there before she could tell me the interest rate. While I understand I am not privy to my mother's account details, why did I have to wait to get home and Google the interest rate which is publicly-available knowledge? So, YET ANOTHER WASTED TRIP!