I contacted capitec regarding decreasing my credit card limit and also enquiring about my charges

I contacted capitec regarding decreasing my credit card limit and also enquiring about my charges. I spoke to them over WhatsApp as I've been told in the past that they can't do it in the branch. I have been spoken to 3 agents unsuccessfully and then I got that we are busy. After speaking to so many people I still have not gotten assisted with what I needed help with.