@Man (wankl). What your image attachment shows is something called 'slippage' which most brokers have and you cannot prevent in most cases. It is not a scam nor the broker trying to 'trick' you. It is a standard part of trading resulting from volatility and available liquidity of the market. Stop-Losses are usually not guaranteed by most brokers, and those that do offer guarantees, usually have a very large 'Stop Level' in place in order to be able to guarantee the position.
So, my suggestion, is that you first learn about this things (such as slippage and 'Stop Levels') before you start doubting your broker!
Deduction = Knowledge + Intuition!