No response to emails.....ever!!

How do I get an Enterprise Manager at the Helderberg Business Branch to answer my emails???? I have sent Zaheed Kader at the Helderberg Business Branch emails on 5 and 9 October 2015 with a simple query. This was followed up with a phone call of complaint to Estelle Germishuys, the bank manager, that promised to follow up on the matter and I requested someone else to deal with my accounts. To date...silence!!!! Seriously considering moving my business elsewhere as this is not the first time that I am experiencing this kind of problem!