Demba Ba does not want to be treated as a 'mercenary' after accusing Hoffenheim of breaking promises in an ongoing transfer row.
The striker has been in London and has not returned to training with his Bundesliga club since Christmas because he thinks that a switch to West Ham has been blocked.
Senegal international Ba claims that he was given the 'green light' to move in the transfer window before going back on the promise.
Hoffenheim general manager Ernst Tanner has threatened to punish Ba by terminating his contract and preventing him from playing for any other club, but the 25-year-old feels he is being treated unfairly.
He wrote on his official website: "I know what I owe to TSG 1899 (Hoffenheim). They brought me to Germany and they believed in my potential. They helped me improve and be a good player in the Bundesliga. For all of that, I thank them.
"I also know that, with my team-mates and the support of our fans, I had the chance to give back a lot to my club by scoring a lot of goals and being a major player in the good performance of the team.
"Today I am one of the oldest players in the team and, due to my seniority, I refuse to be treated like a mercenary or a capricious guy.
"I want to say that I regret this situation, and I suffer from it. The club gave me a green light to leave under certain conditions, which have been met; I hope that the promises made will be fulfilled.
"I just want to ask my club to be honest and to respect the green light that I was given."
Ba was equally intent on joining Bundesliga rivals Stuttgart in 2009, but was told by Hoffenheim that he must respect his contract, which expires in 2013.
Hoffenheim are taking the same stance again now and he is accusing them of scuppering his dream of playing in England.
"A club made an offer to Hoffenheim. From there, I had a talk with our sporting director to discuss my desire to take one more step in my career and join the Premier League," he explained.
Ba added: "Both clubs have negotiated and an offer arrived in Hoffenheim's office. From there, all parties were expected to agree on the transfer.
"However, for some obscure reason, Hoffenheim have suddenly decided otherwise."