No one can force you to marry a person you are not interested to marry whether it is the girl or her family or the Women Commission members. The consent for marriage has to be free and without undue influence otherwise the marriage solemnised under force or undue influence is open for challenging in the court as voidable in nature and to be declared null and void by the decree of the competent district court under section 12(1)(C) of the Hindu Marriage Act,1955.
Any person forcing you to do an act otherwise you will be prosecuted for criminal charges or otherwise harm you is committing offence of criminal intimidation under section 503 which is punishable under section 506 Indian Penal Code.
You need to collect all evidence with regard to such act of criminal intimidation and straight away file private complaint with the judicial magistrate under section 503,506,34,109 IPC against all these persons, as this an non-cognisable offence the local Police will not take register FIR if you make complaint of this offence to them, however if the threats are given to you through Phone, SMS, Email than the provision of the Information & Technology Act, 2000, section 66A will apply too and in that case this becomes an Cognisable Offence under section 77B of this Act of 2000 and the local Police is supposed to register the FIR on your complaint, but as this happens in most cases the Police is inactive and rarely register the FIR rather even if they are directed by the Judicial Magistrate under section 156 Cr.P.C to register the FIR they do register FIR, but they fail to do proper investigation that result in failure to Charge Sheet the named accused in the FIR, so best course is to proceed with private complaint with the judicial magistrate under section 200 of the Cr.P.C.
Once the legal process is initiated by you these people stop putting pressure on you for the marriage, rather they will come forward for compromise and request you to withdraw the criminal complaint against them.