COO and management terminated services showing absent-ism from office and is not paying F&F dues

COO of company I was last working with has personal issues with me due to which he was planning to terminate me from office,he cited cost cutting as reason and was planning to terminate my services giving cost cutting as a reason. I came to know this through my boss to whom I was reporting and my other colleagues. My boss said me this verbally, I was bit disturbed to know this so planned to clarify things, I wrote a e-mail to my boss through my official e-mail citing clarification on my termination in which I clearly stated that if termination news is confirmed then I will do handover and will leave.I also asked my full and final settlement to be done. In response instead of giving clarification,my communication was cut off from office. I then sent multiple e-mail to office HODS,HR head,VP HR but no response was received ever. Though mails were read for which I received receipts. I later on came to know that COO has asked HR to issue me a warning letter asking for absentism and to initiate disciplinary action against me. I received this letter and responded to it on e-mail to which I again didnt get an replies. All my phone calls are now being not answered by HR or HODs. I want to office one day to clarify things but I was not allowed to move in office. In-spite of trying to call office no response is being received and I am worried of my full an final settlement will be done or not. Please advise what I need to do now to get my full and final settlements done. Ihave now not been able to pay my kids school fee home loan emi's and rent of house as my salary has also been stopped.