When you confront power, there is no way to avoid being slandered and misrepresented by the authorities, and there is no reason to fear it.
Of course they will try to distort your aims and intentions; they will say you are terrorists and mufsideen and that you only want to bring chaos. They will try to turn the public against you.
This is much less important than you may imagine. The authorities do not believe the lies they tell, and corporations function according to reality, not propaganda.
If you focus on creating facts on the ground, and communicating your demands directly to power through the disruption of their interests, they will have to concede to you, no matter what they say about you.