Where can I watch Tokyo Ghoul season 3-4?

Hi I'm looking for Tokyo Ghoul season 3-4.

because Netflix has only 2 seasons again, so I'm looking for a site where you can see the Amazon that sells but is personally too expensive for me.

First of all, Tokyo Ghoul has only 3 seasons. The third is Tokyo Ghoul: re, which has 2 parts and is therefore often mistakenly categorized as the third and fourth season. As far as I know you can see everything on Anime on Demand.

All three seasons are legal at Anime on Demand.

You can watch season 3 on anime on demand or dvd / blu ray

But I'd rather advise you to read the manga