No response to email sent to Card Queries

Hello - I sent an email to [Email Removed] - on the 22.Mar, and further ones on the 28th Mar and one today - and still no response. These are for ad-hoc charges that appear on my Credit card statement. I even threatened them today with the option of social media - and it looks like they do not respond. This was simi**** to an experience I had with changing my password - took a week to resolve. Why bother having an email option - if you don't respond to it ! BTW - have you tried phoning the telephone number listed - and It's in JHB and I'm in durbs. It's no difference trying the branch - you just wait and wait.