Disgusting theft of substantial amount of pensioners money

Just joined after being given a flyer enticing people to register. I did everything as instructed and then deposited a substantial sum of money. It went out of my bank account. They have a bot that answers questions and she insisted that I didn't pay. So it's useless talking to a robot, so I called the helpline. A lady asked me to send the proof of payment from my bank. I did this immediately as FNB has a tab where you can get proof of payment instantly. Since then, there in NO response from there. They also promise a rand for rand bonus upon depositing. So I deposited the maximum they asked for. So I am now sure they are out to ***** our money. I am convinced this is a **** to ***** pensioners monies. They should be ashamed of themselves. Where can I report this *****?