Severe Slippage

I've lost around 90℅ money with this broker because they took it from me ,they had sent us a signal called DNNC which was not exist in any platform once we trade the signal after a minute maybe we got a servere slippage and this is not the first time we had the same problem before and they announced that they have mistaken but now they did it on purpose cause its not logical how the chart went down so quickly not like any other cryptocurrency. And also they had rejected my withdrawal which supposed to take only 3 working days from 16 Nov 2022 to be transferred to external wallet but i believe they delayed it intentionally to rejected later . During that time I've searched everywhere to find a way to expose them or to contact anyone for help so i didn't have anyone to contact with cause WhatsApp we got zero response but when I heard about you guys I thought that I have a chance to get my money back from them , and we had a team on a WhatsApp group everyone lost their money in less than a minute, that's not acceptable and wrong,, so please help me get back what I've lost.
Thanks. 10507.96 USD