There's an inherent contradiction in the arguments here.

You can't on the one hand say "people have the right to use Twitter free of harassment" because it's ubiquitous, but then on the other hand say Twitter has the right to censor or ban people whose views it as a company doesn't like. These are contrary positions.

Either Twitter is a "common carrier" and thus has the responsibility to ensure its users have a common standard of experience and ability to access regardless of their political views, or it's not and thus it can both censor users _and_ not respond to their specific concerns because nobody has an inherent right to access it.

You need to choose one of those two.