API rogue agent in industrial property

We decided that we wanted to sell our commercial property to relocate to a different area and contacted several agents whose signs were up in the area. After more than three weeks, this agent finally returned the call and wanted to bring a customer immediately. This before any information about price and commission were even discussed! When he visited he took some pictures to allow him to revisit and value the property properly. He did tour the gentleman around the premises, but we never heard from him again. When we decided to actually go on with putting the business on the market, we contacted three estate agents, of which, one was very much on the ball and the agent from API left a voice note 24 hours later to inform us he would contact us the following morning. That never happened. After signing all the documentation with the active estate agent, she found out that our property was on the internet as 'for sale by API' and the pictures which the agent had taken on his first and only visit were on the website! No official documents in place, no checks done and just plastered on the internet, which is *******. Yesterday I did contact API head office and the gentleman who returned my call would look into the matter and get back to us. Which, now 24 hours later, has not materialized. Yes, the property has been removed from the API website, but obviously with screenshots it is easy to prove it was there. Without any further action from API, all that remains is going to the estate agents board to put a claim through as this kind of rogue behavior is apparently the way that API likes to conduct their business. So potential sellers in the Cape Town area; be aware that your property will be used to fill the site of API so it appears they are a leading estate agent! At present I wonder how many properties on the API site are actual mandates and how many are just '******' information