Ask me to leave

I am working in a MNC last few months I notice that mangemt are using the automation tool for the entire team whereas they informed the client that they are testing it. I raised my voice to it in management and asked them to show the client approval but they don't . They send me to another department for training but I wrote that some illegal activities are doing in my team to Clint in Facebook. Somehow my manager came to know about that and HR department call me for showcause , I replied the showcause same day. They ask me not to come office till the investigation going on, after 14 days I call them and they informed me that I have to join back. Again I started my work but again after 2 months they call me and ask me to leave the organization. I ask them when the policy is clear and they have the screen shot of the Facebook page what I wrote to client then why they call me to rejoin after the investigation of 14 days and now after passing more than 2 months they ask me to leave the organization for the same reason. I don't given my resignation and fight but they don't have any reply of my any questions. I doccument everything in mail but they never reply any thing in a meeting I told them if they have enough doccument against me they can terminate me but still I am working. But they don't send me to any department I regularly go to office swipe in spend my duty hours 9.5 romming hear and there swipe out and com back home as per there last instruction. Till last month I get my salary but this month they are not mark my week offs which results huge deduction in my salary or salary block. What should I do I already informed everything to upper level management and HR till date. I am thinking to file a case against them. Please suggest me.