Call Centre madness

I've been receiving phone calls from the call centre on 14/07/2015. Upon answering my phone, the lady said she is looking for my husband. Firstly I don't know how she got hold of my phone nr. I told her the nr she dialled is my nr and that person she is looking for is my husband. Before I could say anything or ask anything she hung up. <br> This was round about at 11:00 am. <br> Take note that they did phone my husband about a week ago, wanting him sign for a credit card. He told the lady that he is not interested. <br> Again on 14/07/2015 at 13:00pm I receive another phone call from the call centre, again the lady wants to speak to my husband. As soon as she heard my voice, she slams down the phone. <br> We don't even deal with African Bank. So how did they my nr in the first place to get hold of my husband again??<br> Please no more phone calls!