Slow Internet

The internet is very slow and every single time I've tried to write something very important and it buffers, I don't know if it's me having bad luck or the company is lying about fast internet or other reasons. Even posting this is slow because of the internet, I already know lots of people are experiencing this too but I think my problem is worse than others. My teacher is sometimes mad and my parents too because I didn't finish posting a post every 3 weeks of my life, or homework and other things... so that's why I am last.