Absa card blocked

My Absa Gold credit card was blocked with no prior notification I found out that my card was blocked when I tried to make a purchase. I e-mailed absa customer service its been a week I have received no response. I called them to enquire I was told my card was under ***** investigation since 18 Nov 2020 and that the block can't be removed but she couldnt tell me why. She e-mailed the relevant department and I waited for 24 hours and called again because they did not give me any feedback. I was kept on hold for 15 minutes and then I cancelled the call. Now its another 24 hours later. I have not received any explanation or response from Absa. Pathetic!