Why don't people take me seriously?

This is a very common problem for me. Everywhere, every time with everyone. Is like they can’t hear me, or like if i don’t exist. And the very few times that people hear me they misunderstand my words and take it like strong language (abuses).

For example people from here. I made a question like a month ago and the first people that answer me don’t believe my words, the first impression of this person was don’t trust in me.