Large scale changes in a country's political policy will require significant legislative efforts. To express your opinion on how your government should address the weaponisation of space, you can contact your elected officials directly.
Remember that an elected official in your area works for YOU, and it is their duty to listen to your concerns.
The best approach when contacting your representative is to be courteous, explain what the issue is, state what your stance is on it, and tell them what you would like them to do. Keep in mind that they are busy and may not be able to reply to you.
You can find your federal elected officials here and the contact info for both of your Senators and your Representative of the House.
You can find the Member of Parliament and their contact info here .
You can find the contact info for your Member of Parliament in the Lok Sabha House of the People here.
You can contact your Deputy in the Sate Duma of the Federal Assembly of Russia here.