Totally ignoring clients emails

My son and I have a few fixed deposits and accounts with Bidvest Bank. To get any kind of service or replies from them is a nightmare. I have recently asked a very simple question of when my fixed deposits expire. There was a response listing the same fixed deposit twice instead of the 2 individual fixed deposits. I sent 3 follow up emails to a Jessica and still no response. Supposedly 3 working days to respond. Its now a week later. Its not the 1st time I am having service related issues with Bidvest Bank.