Why Transformers Prime last only 65 episodes?

I bet I'm not the only one who is shock and angry that season 3 of TF Prime will have only 13 episodes and will be the last season of the show.
What happen? What's going on? How come the show suddenly decided to end after 3 seasons?
Was it ratings suddenly take a dip? Money issues? Contract disputes?
Or will there be a new Transformers show to follow after Prime?
TF Prime should have more than 65 episodes. I was really enjoying Prime.
Shouldn't Prime get more episodes? Is there any petitions to join to bring more episodes to Prime?

Was it ratings suddenly take a dip? Money issues? Contract disputes?
Or will there be a new Transformers show to follow after Prime?
TF Prime should have more than 65 episodes. I was really enjoying Prime.
Shouldn't Prime get more episodes? Is there any petitions to join to bring more episodes to Prime?