Worst Broker Ever

I made a trade transaction based on trade price that was displayed on the Easy Equity App, they even have a button which can be pressed to see live price updated, on this particular case i pressed the button 3-4 times and it showed trading price R831, when i finally traded the confirmed price was not the R831 shown. I have raise issue and they could not assist me, I will be moving to a new broker as this isn't first time this happens.