With his deal running down this season, the 37 year-old has received an offer for next season on dramatically less money.
Advertisement
Advertisement
Tomaszewski told Super Express: "We appealed three or four months ago about this issue.
"Robert, behave like a man. You're not just anyone. You're the most famous Pole in history, and you allow yourself to be treated like this at Barça?
"If Robert leaves now, let Barcelona do what they want and win the Spanish league title.
"I'm convinced that Robert, whether he plays in MLS or for another team in Europe, will be treated as he deserve."