fbs eats my 30,000 $ profit

Hello I had a heavy balance of around 1 million dollars and a lot of trading activity in the FBS broker in several years. I had 3 pending orders of 10 lots (totally 30 lots) of EURUSD that were activated at a set price in the Monday opening gap (12 May 2025 , opening price was 1.11850 and executable orders was 1.1202 but FBS executed on 1.1240) , not the real live price of the market. I had the same positions in the FXOPEN broker and the XM broker too, and they were activated at the live real market price, but FBS activated them at a set price. My accounts in all of them are ECN, so FBS must activate at the live price in market execution (not instant execution). This 400-point difference made almost $30,000 different!!!! FBS answered me it's normal because we use different LP, which is clearly a lie. (look at attachments)