Toure's agent Dimitri Seluk has warned he wants a new contract offer tabled by Saturday or he'll quit.
And he says he's being treated by City directors Ferran Soriano and Txiki Begiristain just as they treated the Ivorian at Barcelona.
The agent told The Sun: "Yaya is extremely well paid at City and is the first to recognise that. But he is the No 1 in the world in his position and can get the same money elsewhere. He has been ready to sign for six months on the same money.
"He is the best box-to-box midfielder in the world. He can also play centre-half, even play centre- forward. Feran Soriano and Txiki Begiristain sent an offer, but Yaya can leave in two months and still it is not finalised.
"I ask myself, Txiki was at Barcelona when Yaya left, so maybe now they are at City and Yaya will leave again. We want to leave the club, because if they really wanted to do good by Yaya they'd have completed the contract a few months ago.
"They are still discussing small details, not the salary. For a player like Yaya and a club like City it's bad to see this. A pat on the back is more important than anything, you know. Around the stadium while there are pictures of every player of City commemorating their recent successes there is not a single one of Yaya. At the club shop you can find shirts to buy with the names of every player, but not Yaya's.
"Barcelona and Real Madrid arrange private flights when players go to pick up awards. Their club presidents attended the FIFA Ballon D'Or in Zurich to be with their players. When Yaya went to pick up the award for Africa Player of the Year he took regular flights and paid for them. Nobody from the club went with him.
"City are a big club but did not arrange anything for Yaya. They never offered to pay for his flights and, of course, Yaya would never ask for that. It's ridiculous, just for a few hundred pounds. But it shows their mentality because this award was big for the international prestige of City, too.
"I live in Barcelona and a lot of people still say that letting him leave was the biggest mistake they made in recent years. Roberto Mancini has been brilliant and very supportive. He appreciates what Yaya means to the club. But not the staff.
"It started with Brian Marwood and now it continues with the same people that were at Barcelona when Yaya was forced to leave. Txiki is a new technical director and maybe he wants to bring in other players to replace Yaya.
"If the contract was to be finished, done and signed in three days then maybe Yaya would be convinced to stay. But I don't think so. They will not do it and Yaya will not change his mind."