No Access to Account

I have been a business banking client for almost 2 decades now. Recently, with the change in Standard Bank's on-line banking interface, the access to my business banking account was removed. In fact I cannot even see the balance on my account. About a week ago I contacted the 'relationship manager' at the branch in Sandton a certain Chantal Swart and at first she was communicative and responded to my emails. Now, I get absolutely no response and this has been going on for over a week now. I am in a dilemma as I do not have on-line access to my account and need this to be restored asap. i'm totally disappointed and would be most grateful if this is escalated so that someone can contact me and help me restore access to my account. Also why does SB keep messing around with the on line banking interface and cause customers unnecessary grief when the 'old' platform works just fine. And if you change over this should be seamless without affecting client profiles that cause customers unnecessary angst.