Government is heirarchy

It is not. It can be, but it is not a fundamental aspect of it.

An elected representative has de facto authority. If someone can opt out of being governed in this way then there are no rules, just suggestions.

Sure. Not in opposition to Anarchism.

I recommend you visit the links above. You should be able to find the answers to your issues. For this case, this addresses some of it:

https://theanarchistlibrary.org/library/the-anarchist-faq-editorial-collective-an-anarchist-faq-full#text-amuse-label-seca211