No coms from Dicovery Bank

An add on facebook had me fooled and I tried to buy some tools. My bank Discovery decided this was ***** and stopped the transaction immediately. Well done!! The a couple of days later, this same company claimed 15 US dollars from my account which Discovery approved. The moment I became aware of this I called the ***** department tried to reverse the transaction and cancelled my card. With a 72 hour turnaround it's already been three weeks later and nothing, no money no correspondence. When asked why, when Discovery decided that it's ***** the money was immediately returned to my account. When I reported ***** nothing could be done as the transaction was still pending.