"Four-and-a-half months ago I was an Italian champion and then I found myself shut out and abandoned by everyone, without a club to play for," Cesar said at his Bologna unveiling.
"It was very hard and people asked me why. The reply was simple - I was cut out at Inter because I was one of Mancini's men.
"I paid for Mancio's sacking and it wasn't fair. They made promises to me in June, so I didn't go looking for another club and then I heard nothing.
"The Nerazzurri forgot me. All they had to say was that they didn't want me but I believed in them. Now I don't trust anyone."