The striker joined the Hammers in a loan move from Juventus which is said to have cost the club £5m plus a further fee to be paid if the deal were to become permanent.
After an indifferent spell with the London side there is no chance of the deal being made a full time one and he is back in Italy negotiating his next step with his parent club.
His agent, and father, Antonio says he never chose to play for West Ham in the first place.
"Simone has a great desire to return to play in Italian football, and we have to choose the most suitable destination for him and for Juventus," he said.
"Now we're trying to bring Simone back to Italy because he loves this country. We didn't choose West Ham.
"No-one forced us, but Simone never wanted to go abroad, he loves Italy and Serie A.
"A series of circumstances led to him going to the Premier League. Now he's gone and we look to the future."