Njafx tempts to order recommendation and slippage

I joined the Wechat group which named"Njafx lecture hall 2019 internal elite exchange group 2"and got my account to have lessons.The teacher taught stock methods,analyzed stock and provided bull market.The teachers are Gudao teacher, Cangyang teacher, blue sky teacher, broad bean teacher, Wang Cheng teacher and other mysterious guests.The teacher said that he would guide us to take back our deposit during stock market downturn.He told us to do double plans in hedge transaction and investing in stock again when it recovers.The teacher and his assistant told us to open an account of Njafx on 18th,June.I deposited on the 19th,June and did CHINA-A50 index operation under the teacher's order recommendaiton.Gudao teacher did order recommendation on Wechat himself while blue sky and broad bean teacher did it in class.We did CHN50 index operation from 26th,June.But teachers' order recommendation would always cause rebound losses.The platform appeared to be stuck and caused large amounts of losses after teachers' order recommendation on the 28th,June.The customer service replied that"The system is upgrading.Today is the summit of G20 and the global trading software is upgrading."The beginning of G20 influenced and the software is upgrading."I deposited in my account namely on the 19th,20th and 25th,June,2019,101998.47 in total,all lost.