Firstly, please note that offences under both the sections mentioned by you, i.e., Section 500 (defamation) and Section 507 (Criminal intimidation by anonymous communication or having taken precaution to conceal whence the threat comes) are non-cognizable and the police does not have the power to register FIR and start investigation on its own. So, it is doubtful whether FIR would have been registered under these two sections by the police, and there appears to be something missing in your question.
Anyway, presuming that the information given by you is correct, after submission of the charge sheet in the court, usually copy of the charge sheet (along with other papers) is given to the accused at the time of his first appearance in court. From the question, it appears that you have not been summoned to appear before the court so far though the charge sheet has apparently been filed on 6th October 2017. So, you may wait till you are asked to appear in the court, At the time of your appearance in the court, as and when you are asked to appear, you may get copy of the charge sheet along with other papers, such as statements of the witnesses and documents.
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